Respostas

2013-12-08T18:00:39-02:00
A) -2(x-4)+2x+x=-5x+3
 -2x + 8 +2x + x = -5x + 3
+6x = -5
x= - 5/6

b) -3(-x+1)+5x=+8-x
3x - 3 + 5x = 8 - x
9x= 11
x= 11/9

c) 3x+x-2x+8=-7+2x
0x= -15
x=0

d) 4(-x-1)+2x=+8-3x+1
-4x -4 +2x = +8 -3x +1
x=5