Question

2.(x-2)+5.(2-x)+6.(x+1)=0

Answer 1

2x-4+10-5x+6x+6=0
2x-5x+6x=4-10-6
3x=-12
x=3:12
x=4

Answer 2

2(x-2)+5(2-x)+6(x+1)=0
2x-4+10-5x+6x+6=0
2x-5x+6x=0+4-10-6
3x=-12
x=-12/3   jogo de sinal - com + = -
x=-4

o valor do x é -4