3x – 2 = x + 6 g) X/6 = 3 + 6
2 (x – 5) = x – 4 h) -49 + 86 + X = -74 + 39
X + 2 (x + 1) = 11 i) -243 = X - 45
2 (X + 4) = 14 J) 5X + 8 = -87
2/5 X + X = 21 k) 625 = 73 – 12a
6 + 3X = 15
doy 50 puntos al que los hace xd
Respuestas a la pregunta
- Solución:
❀ Resolvemos:
3x - 2 = x + 6
3x - x = 6 + 2
2x = 8
x = 8 : 2
x = 4
Comprobamos:
3x - 2 = x + 6
3 . 4 - 2 = 4 + 6
12 - 2 = 10
10 = 10
❀ Resolvemos:
x / 6 = 3 + 6
x / 6 = 9
x = 9 . 6
x = 54
Comprobamos:
x / 6 = 3 + 6
54 / 6 = 3 + 6
9 = 9
❀ Resolvemos:
2 (x - 5) = x - 4
2x - 10 = x - 4
2x - x = -4 + 10
x = 6
Comprobamos:
2 (x - 5) = x - 4
2 . ( 6 - 5) = 6 - 4
2 . 1 = 2
2 = 2
❀ Resolvemos:
-49 + 86 + x = -74 + 39
37 + x = -35
x = -35 - 37
x = -72
Comprobamos:
-49 + 86 + x = -74 + 39
-49 + 86 + (-72) = -35
-49 + 86 - 72 = -35
37 - 72 = -35
-35 = -35
❀ Resolvemos:
x + 2 (x + 1) = 11
x + 2x + 2 = 11
3x + 2 = 11
3x = 11 - 2
3x = 9
x = 9 : 3
x = 3
Comprobamos:
x + 2 (x + 1) = 11
3 + 2 . (3 + 1) = 11
3 + 2 . 4 = 11
3 + 8 = 11
11 = 11
❀ Resolvemos:
-243 = x - 45
-243 + 45 = x
-198 = x
Comprobamos:
-243 = x - 45
-243 = -198 - 45
-243 = -243
❀ Resolvemos:
2 (x + 4) = 14
2x + 8 = 14
2x = 14 - 8
2x = 6
x = 6 : 2
x = 3
Comprobamos:
2 (x + 4) = 14
2 (3 + 4) = 14
2 . 7 = 14
14 = 14
❀ Resolvemos:
5x + 8 = -87
5x = -87 - 8
5x = -95
x = -95 : 5
x = -19
Comprobamos:
5x + 8 = -87
5 . (-19) + 8 = -87
-95 + 8 = -87
-87 = -87
❀ Resolvemos:
2/5x + x = 21
1 2/5 x = 21
x = 21 : 1 2/5
x = 21/1 : 7/5
x = 21.5/1.7
x = 105/7
x = 15
Comprobamos:
2/5x + x = 21
2/5 . 15 + 15 = 21
2.15/5.1 + 15 = 21
30/5 + 15 = 21
6 + 15 = 21
21 = 21
❀ Resolvemos:
625 = 73 - 12a
625 - 73 = -12a
552 = -12a
552 : (-12) = a
-46 = a
Comprobamos:
625 = 73 - 12a
625 = 73 - 12 . (-46)
625 = 73 - (-552) =
625 = 73 + 552
625 = 625
❀ Resolvemos:
6 + 3x = 15
3x = 15 - 6
3x = 9
x = 9 : 3
x = 3
Comprobamos:
6 + 3x = 15
6 + 3 . 3 = 15
6 + 9 = 15
15 = 15