Respostas

2014-09-02T08:46:28-03:00
4x-8=5-8x/2
4x-8=10-8x/2
8x-16=10-8x
16x=26
X=26/16
X=13/8
2014-09-02T08:46:40-03:00
Faça a distributiva
4x-8=5(-x/2)-4
4x-8-5+4=-x/2
4x-9=-x/2
2(4x-9)=-x
8x-18=-x
-18=-9x
-18/-9=x
x=2