Question

Плес, 21ая!!!!!!!!!!!!!!

Answer 1

$displaystyle left { {{2x-y=-8} atop { frac{x-1}{2}+ frac{y}{3} =1 }} right. Rightarrow left { {{y=8+2x} atop { frac{x-1}{2}+ frac{8+2x}{3}=1 }} right. Rightarrow left { {{y=8+2x} atop {3(x-1)+2(8+2x)=6}} right. \\Rightarrow left { {{y=6} atop {x=-1}} right.$

Answer 2

спасибо