Question

Ajuda!!!!!!!

7x+2(-x-1)-x=5+(4x-7)

3 (2x+1)-4 (x-3)+2 (2x-1)=-(x+3) -2 (4-x)

Answer 1

a) 7x + 2.( - x - 1) - x = 5 + (4x - 7)
7x - 2x - 2 - x = 5 + 4x - 7
5x - x - 4x = 5 - 7 + 2
0.x = 0 (sem solução)

b) 3.(2x + 1) - 4 (x - 3) + 2 (2x - 1) = - (x + 3) - 2 (4 - x)
6x + 3 - 4x + 12 + 4x - 2 = -x - 3 - 8 + 2x
6x - 4x + 4x + x -2x = - 3 - 8 - 3 - 12 + 2
5x = - 24
x = -24/5