5-3×-11-8×=(6-4×)-(6-3×)
9+7×+(×-8×)=40-(6×-12)+17
15+16×+(11-16×)=2 (10-4×)
532-(220×-137)-15×=690-238×
23×+2 (×-1)=3×-5
45×-(13×-11)=0
9×-(-×+21)=15×-11+(-12×+4)
12-[×+(12×-7)+8×]=13-(-3×+4)
8×+5 (×-3)=-13×-2
6 (×+2)-3 (×-1)=8 (4×-10)
2-×+4(2×-10)=20+3 (2-4×-10)
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5-3×-11-8×=(6-4×)-(6-3×)
5 - 3x - 11 - 8x = (6 - 4x) - (6 - 3x)
- 6 - 11x = 6 - 4x - 6 + 3x
- 6 - 11x = - x
- 11x + x = 6
- 10x = 6
x = 6/-10
x = - 3/5
COMPROBAMOS LA SOLUCIÓN.
5 - 3x - 11 - 8x = (6 - 4x) - (6 - 3x)
5 - 3x - 11 - 8x = 6 - 4x - 6 + 3x
5 - 3 (- 3/5) - 11 - 8 (- 3/5) = 6 - 4 (- 3/5) - 6 + 3 (- 3/5)
5 + 9/5 - 11 + 24/5 = 6 + 12/5 - 6 - 9/5
(9 + 24)/5 - 6 = (12 - 9)/5
33/5 - 6 = 3/5
(- 6 * 5 + 33)/5 = 3/5
(- 30 + 33)/5 = 3/5
3/5 = 3/5
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9+7×+(×-8×)=40-(6×-12)+17
9 + 7x + (x - 8x) = 40 - (6x - 12) + 17
9 + 7x + x - 8x = 40 - 6x + 12 + 17
9 + 8x - 8x = 69 - 6x
9 = 69 - 6x
6x = 69 - 9
6x = 60
x = 60/6
x = 10
COMPROBAMOS LA SOLUCIÓN.
9 + 7x + (x - 8x) = 40 - (6x - 12) + 17
9 + 7 (10) + (10 - 8 (10)) = 40 - (6 (10) - 12) + 17
9 + 70 + (10 - 80) = 40 - (60 - 12) + 17
79 + (- 70) = 57 - (48)
79 - 70 = 57 - 48
9 = 9
-------------------------------------------------------------------------------------------
15+16×+(11-16×)=2 (10-4×)
15 + 16x + (11 - 16x) = 2 (10 - 4x)
15 + 16x + 11 - 16x = 20 - 8x
26 = 20 - 8x
8x = 20 - 26
8x = - 6
x = - 6/8
x = - 3/4
COMPROBAMOS LA SOLUCIÓN.
15 + 16x + (11 - 16x) = 2 (10 - 4x)
15 + 16 (- 3/4) + (11 - 16 (- 3/4)) = 2 (10 - 4 (- 3/4))
15 - 48/4 + (11 + 48/4) = 2 (10 + 12/4)
15 - 12 + (11 + 12) = 2 (10 + 3)
3 + (23) = 2 (13)
3 + 23 = 26
26 = 26
---------------------------------------------------------------------------------------------
532-(220×-137)-15×=690-238×
532 - (220x - 137) - 15x = 690 - 238x
532 - 220x + 137 - 15x = 690 - 238x
669 - 235x = 690 - 238x
- 235x + 238x = 690 - 669
3x = 21
x = 21/3
x = 7
COMPROBAMOS LA SOLUCIÓN.
532 - 220x + 137 - 15x = 690 - 238x
532 - 220 (7) + 137 - 15 (7) = 690 - 238 (7)
532 - 1540 + 137 - 105 = 690 - 1666
669 - 1645 = - 976
- 976 = - 976
-------------------------------------------------------------------------------------------------
5 - 3x - 11 - 8x = (6 - 4x) - (6 - 3x)
- 6 - 11x = 6 - 4x - 6 + 3x
- 6 - 11x = - x
- 11x + x = 6
- 10x = 6
x = 6/-10
x = - 3/5
COMPROBAMOS LA SOLUCIÓN.
5 - 3x - 11 - 8x = (6 - 4x) - (6 - 3x)
5 - 3x - 11 - 8x = 6 - 4x - 6 + 3x
5 - 3 (- 3/5) - 11 - 8 (- 3/5) = 6 - 4 (- 3/5) - 6 + 3 (- 3/5)
5 + 9/5 - 11 + 24/5 = 6 + 12/5 - 6 - 9/5
(9 + 24)/5 - 6 = (12 - 9)/5
33/5 - 6 = 3/5
(- 6 * 5 + 33)/5 = 3/5
(- 30 + 33)/5 = 3/5
3/5 = 3/5
-------------------------------------------------------------------------------------------
9+7×+(×-8×)=40-(6×-12)+17
9 + 7x + (x - 8x) = 40 - (6x - 12) + 17
9 + 7x + x - 8x = 40 - 6x + 12 + 17
9 + 8x - 8x = 69 - 6x
9 = 69 - 6x
6x = 69 - 9
6x = 60
x = 60/6
x = 10
COMPROBAMOS LA SOLUCIÓN.
9 + 7x + (x - 8x) = 40 - (6x - 12) + 17
9 + 7 (10) + (10 - 8 (10)) = 40 - (6 (10) - 12) + 17
9 + 70 + (10 - 80) = 40 - (60 - 12) + 17
79 + (- 70) = 57 - (48)
79 - 70 = 57 - 48
9 = 9
-------------------------------------------------------------------------------------------
15+16×+(11-16×)=2 (10-4×)
15 + 16x + (11 - 16x) = 2 (10 - 4x)
15 + 16x + 11 - 16x = 20 - 8x
26 = 20 - 8x
8x = 20 - 26
8x = - 6
x = - 6/8
x = - 3/4
COMPROBAMOS LA SOLUCIÓN.
15 + 16x + (11 - 16x) = 2 (10 - 4x)
15 + 16 (- 3/4) + (11 - 16 (- 3/4)) = 2 (10 - 4 (- 3/4))
15 - 48/4 + (11 + 48/4) = 2 (10 + 12/4)
15 - 12 + (11 + 12) = 2 (10 + 3)
3 + (23) = 2 (13)
3 + 23 = 26
26 = 26
---------------------------------------------------------------------------------------------
532-(220×-137)-15×=690-238×
532 - (220x - 137) - 15x = 690 - 238x
532 - 220x + 137 - 15x = 690 - 238x
669 - 235x = 690 - 238x
- 235x + 238x = 690 - 669
3x = 21
x = 21/3
x = 7
COMPROBAMOS LA SOLUCIÓN.
532 - 220x + 137 - 15x = 690 - 238x
532 - 220 (7) + 137 - 15 (7) = 690 - 238 (7)
532 - 1540 + 137 - 105 = 690 - 1666
669 - 1645 = - 976
- 976 = - 976
-------------------------------------------------------------------------------------------------
45x - (13x - 11) = 0
45x - 13x + 11 = 0
32x + 11 = 0
32x = - 11
x = - 11/32
COMPROBAMOS LA SOLUCIÓN.
45x - (13x - 11) = 0
45 (- 11/32) - (13 (- 11/32) - 11) = 0
- 495/32 - (- 143/32 - 11) = 0
- 495/32 + 143/32 + 11 = 0
(- 495 + 143)/32 + 11 = 0
- 352/32 + 11 = 0
(32 * 11 - 352)/32 = 0
(352 - 352)/32 = 0
0/32 = 0
0 = 0
9x - (- x + 21) = 15x - 11 + (- 12x + 4)
9x + x - 21 = 15x - 11 - 12x + 4
10x - 21 = 3x - 7
10x - 3x = - 7 + 21
7x = 14
x = 14/7
x = 2
COMPROBAMOS LA SOLUCIÓN.
9x - (- x + 21) = 15x - 11 + (- 12x + 4)
9 (2) - (- 2 + 21) = 15 (2) - 11 + (- 12 (2) + 4)
18 - (19) = 30 - 11 + (- 24 + 4)
18 - 19 = 19 + (- 20)
- 1 = 19 - 20
- 1 = - 1
12 - [x + (12x - 7) + 8x] = 13 - (- 3x + 4)
12 - [x + 12x - 7 + 8x] = 13 + 3x - 4
12 - [21x - 7] = 9 + 3x
12 - 21x + 7 = 9 + 3x
19 - 21x = 9 + 3x
- 21x - 3x = 9 - 19
- 24x = - 10
x = - 10/-24
x = 5/12
12 - [x + 12x - 7 + 8x] = 13 + 3x - 4
12 - [5/12 + 12 (5/12) - 7 + 8 (5/12)] = 13 + 3 (5/12) - 4
12 - [5/12 + 60/12 - 7 + 40/12] = 13 + 15/12 - 4
12 - [(5 + 60 + 40)/12 - 7] = 9 + 15/12
12 - [(105/12) - 7] = (12 * 9 + 15)/12
12 - [(- 7 * 12 + 105)/12] = (108 + 15)/12
12 - [(- 84 + 105)/12* = 123/12
12 - [21]/12 = 41/4
12 - 21/12 = 41/4
(12 * 12 - 21)/12 = 41/4
(144 - 21)/12 = 41/4
123/12 = 41/4
41/4 = 41/4
8x + 5 (x - 3) = - 13x - 2
8x + 5x - 15 = - 13x - 2
13x - 15 = - 13x - 2
13x + 13x = - 2 + 15
26x = 13
x = 13/26
x = 1/2
COMPROBAMOS LA SOLUCIÓN.
8x + 5 (x - 3) = - 13x - 2
8 (1/2) + 5 (1/2 - 3) = - 13 (1/2) - 2
8/2 + 5/2 - 15 = - 13/2 - 2
4 + 5/2 - 15 = (- 2 * 2 - 13)/2
- 11 + 5/2 = (- 4 - 13)/2
(- 11 * 2 + 5)/2 = - 17/2
(- 22 + 5)/2 = - 17/2
- 17/2 = - 17/2
6 (x + 2) - 3 (x - 1) = 8 (4x - 10)
6x + 12 - 3x + 3 = 32x - 80
3x + 15 = 32x - 80
3x - 32x = - 80 - 15
- 29x = - 95
x = - 95/-29
x = 95/29
COMPROBAMOS LA SOLUCIÓN.
6 (x + 2) - 3 (x - 1) = 8 (4x - 10)
6 (95/29 + 2) - 3 (95/29 - 1) = 8 (4 (95/29) - 10)
570/29 + 12 - 285/29 + 3 = 8 (380/29 - 10)
(570 - 285)/29 + 15 = 3040/29 - 80
285/29 + 15 = (- 80 * 29 + 3040)/29
(29 * 15 + 285)/29 = (- 2320 + 3040)/29
(435 + 285)/29 = 720/29
720/29 = 720/29
2 - x + 4 (2x - 10) = 20 + 3 (2 - 4x - 10)
2 - x + 8x - 40 = 20 + 3 (- 4x - 8)
- 38 + 7x = 20 - 12x - 24
- 38 + 7x = - 12x - 4
7x + 12x = - 4 + 38
19x = 34
x = 34/19
2 - x + 4 (2x - 10) = 20 + 3 (2 - 4x - 10)
2 - 34/19 + 4 (2 (34/19 - 10) = 20 + 3 (2 - 4 (34/19) - 10)
2 - 34/19 + 4 (68/19 - 10) = 20 + 3 (- 8 - 136/19)
2 - 34/19 + 272/19 - 40 = 20 - 24 - 408/19
(- 34 + 272)/19 - 38 = - 4 - 408/19
238/19 - 38 = (- 4 * 19 - 408)/19
(- 38 * 19 + 238)/19 = (- 76 - 408)/19
(- 722 + 238)/19 = - 484/19
- 484/19 = - 484/19
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23x + 2 (x - 1) = 3x - 5
23x + 2x - 2 = 3x - 5
25x - 2 = 3x - 5
25x - 3x = - 5 + 2
22x = - 3
x = - 3/22
COMPROBAMOS LA SOLUCIÓN.
23x + 2 (x - 1) = 3x - 5
23 (- 3/22) + 2 (- 3/22 - 1) = 3 (- 3/22) - 5
- 69/22 - 6/22 - 2 = - 9/22 - 5
(- 69 - 6)/22 - 2 = (- 5 * 22 - 9)/22
- 75/22 - 2 = (- 110 - 9)/22
(- 2 * 22 - 75)/22 = - 119/2
(- 44 - 75)/22 = - 119/2
- 119/22 = - 119/22