Respostas

2014-09-04T02:42:56-03:00
2*x - 6 - 8*x - 4 = 4*x - 40
2*x - 8*x - 4*x = -40 + 6 + 4
-10*x= -30
x=3
2014-09-04T09:24:31-03:00
2 ( x - 3 ) - 4 ( 2x + 1 ) = 4 ( x - 10 )

2x - 6 - 8x - 4 = 4x - 40

2x - 8x - 4x = - 40 + 6 + 4

- 10x = - 30 . ( - 1 )

10x = 30

x = 30/10

x = 3