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

[latex]x+ \frac{x}{2} =-12 \\ \\ \frac{2x+x}{2} =-12 \\ \\ \frac{3x}{2} =-12 \\ \\ 3x=-24 \\ \\ x=-8[/latex] [latex]x+ \frac{x}{3} =8 \\ \\ \frac{3x+x}{3} =8 \\ \\ \frac{4x}{3} =8 \\ \\ 4x=24 \\ \\ x=6[/latex] [latex]x+ \frac{x}{7} =-8 \\ \\ \frac{7x+x}{7} =-8 \\ \\ \frac{8x}{7} =-8 \\ \\ 8x=-56 \\ \\ x=-7[/latex] [latex]x+ \frac{x}{2} =-6 \\ \\ \frac{2x+x}{2} =-6 \\ \\ \frac{3x}{2} =-6 \\ \\ 3x=-12 \\ \\ x=-4[/latex]

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