Question

Resultado de 7a+25=738 , 2(3a+7=67 , 7(x+1=8 , 12x+7+12x+8+15+15=30

Answer 1

1.

$a = \frac{713}{7}$

2.

$a = 20$

3.

$x = \frac{1}{7}$

4.

$x = - \frac{5}{8}$