Question

2(1-5x)+3(-1-x)-4(-7+2x)=-x

Answer 1

2(1-5x)+3(-1-x)-4(-7+2x)=-x
2 - 10x -3 - 3x + 28 - 8x = - x
2-3+28 -10x - 3x -8x = -x
27 - 21x = -x
27 = -x + 21x
27 = 20x
27/20 = x
1 7/20 = x

Answer 2

Olá!!!

Resolução!!!

2 ( 1-5x ) + 3 ( -1-x ) - 4 ( -7+2x ) = - x
2 - 10x - 3 - 3x + 28 - 8x = - x
- 10x - 3x - 8x + x = - 2 + 3 - 28
- 13x - 8x + x = 1 - 28
- 21x + x = - 27
- 20x = - 27 • ( - 1 )
20x = 27
x = 27/20

S = { 27/20 }

Espero ter ajudado...