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 |•22х+х=-243х=-24х=-8х+х/3=8 |•33х+х=244х=24х=6х+х/7=-8|•77х+х=-568х=-56Х=-7х+х/2=-6|•22х+х=-123х=-12Х=-4