3) 5(4 + x) = 7x-2
4) 2(x +3) = 12
5) 5(3x + 2) = 8(9-2x)
6) 38 + 7(x – 3) = 9(x - 1)
7) 2(3x – 7) + 6 = 4x – 3(2- 2x)
8) 11x + 4 = 3(1 – 2x) + 1
9) 7(3x + 2) -5(4x - 3) = 4(x - 2) + 1
10) 2 (x+3) -6 (5+x) = 3x+4
Respuestas a la pregunta
3) 5(4 + x) = 7x-2
20+5x=7x-2
5x-7x=-2-20
- 2x=-22
X = - 22/-2
X =11
4) 2(x +3) = 12
2x+6 = 12
2x = 12-6
2x=6
X=6/2
X=3
5) 5(3x + 2) = 8(9-2x)
15x+10=72-16x
15x+16x=72-10
31x = 62
X =62/31
X = 2
6) 38 + 7(x – 3) = 9(x - 1)
38+7x-21 = 9x - 9
7x-9x =21-9-38
- 2x = - 8
X = - 8/-2
X = 4
7) 2(3x – 7) + 6 = 4x – 3(2- 2x)
6x - 14+6=4x-6+6x
- 4x=14
X =14/-4
X = - 7
8) 11x + 4 = 3(1 – 2x) + 1
11x+4=3-6x+1
11x +6x =3-4+1
17x = 0
X = 17
9) 7(3x + 2) -5(4x - 3) = 4(x - 2) + 1
21x+14-20x+15=4x-8+1
21x - 20x-4x=20-14-15-8+1
- 3x =12
X = 12/-3
X = - 4
10) 2 (x+3) -6 (5+x) = 3x+4
2x+6-30-6x=3x+4
2x-6x-3x=-6+30-4
- 7x = 20
X = - 20/7