Question

1) 4(5x+2)-7(3x+5) =x - 31
2) 5(x+7) =4x-2(2-13)
3). 2(x-9) +4=30
4) 4(x+1) - 20=28
5) (2x-6)/3=x/2​

Answer 1

Explicación paso a paso:

1.

$4(5x + 2) - 7(3x + 5) = x - 31$

$20x + 8 - 21x - 35 = x - 31$

$- x - 27 = x - 31$

$4 = 2x$

$x = 2$

2.

$5(x + 7) = 4x - 2(2 - 13)$

$5x + 35 = 4x - 22$

$x = - 57$

3.

$2(x - 9) + 4 = 30$

$2x - 18 + 4 = 30$

$2x = 44$

$x = 22$

4.

$4(x + 1) - 20 = 28$

$4x + 4 - 20 = 28$

$4 x = 44$

$x = 11$

5.

$\frac{2x - 6}{3} = \frac{x}{2}$

$4x - 12 = 3x$

$x = 12$