Question

a) 2-3x-2x+12-3x b)7(x-5)=3(x+1)  c)3(x-2)=4(-x+3)  d)2(x+1)-(x-1)=0

Answer 1

a) 2-3x-2x+12-3x
-3x - 2x - 3x + 2 + 12
- 8x + 14

b)7(x-5)=3(x+1)
7x - 35 = 3x + 3
7x - 3x = 3 + 35
4x = 38
x = 38/4   simplificando 38 e 4 por 2
x = 19/2


c)3(x-2)=4(-x+3)
3x - 6 = - 4x + 12
3x + 4x = 12 + 6
7x = 18
x = 18/7

d)2(x+1)-(x-1)=0
2x + 2 - x + 1 = 0
2x - x = - 2 - 1
x = - 3