Question

resolva a equaçao 2x -4 + x = -2 + 4x

Answer 1

2x - 4 + x = -2 + 4x
3x - 4 = -2 + 4x 
-4 - 2 = 4x - 3x
- 6 = x

Answer 2

fica melhor reduzi -lá
2x-4-8=4x
2x-12=4x
2x-4x=12
-2x=12
x=12
____
-2
x=-6
resposta final :-6