Question

X+x/2=-12 x+x/3=8 x+x/7=-8 x+x/2=-6

Answer 1

$x+ \frac{x}{2} =-12 \\ \\ \frac{2x+x}{2} =-12 \\ \\ \frac{3x}{2} =-12 \\ \\ 3x=-24 \\ \\ x=-8$

$x+ \frac{x}{3} =8 \\ \\ \frac{3x+x}{3} =8 \\ \\ \frac{4x}{3} =8 \\ \\ 4x=24 \\ \\ x=6$

$x+ \frac{x}{7} =-8 \\ \\ \frac{7x+x}{7} =-8 \\ \\ \frac{8x}{7} =-8 \\ \\ 8x=-56 \\ \\ x=-7$

$x+ \frac{x}{2} =-6 \\ \\ \frac{2x+x}{2} =-6 \\ \\ \frac{3x}{2} =-6 \\ \\ 3x=-12 \\ \\ x=-4$

Answer 2

Х+х/2=-12 |•2
2х+х=-24
3х=-24
х=-8

х+х/3=8 |•3
3х+х=24
4х=24
х=6

х+х/7=-8|•7
7х+х=-56
8х=-56
Х=-7

х+х/2=-6|•2
2х+х=-12
3х=-12
Х=-4