{5Х-у=11, {y=5x-11, {y=5*0-11 {y=-11
{-10х+2у=-22 {-10x+2(5x-11)=-22 {-10x+10x-22=-22 {0=0
ответ: (0; -11)
{5Х-у=11, {y=5x-11, {y=5*0-11 {y=-11
{-10х+2у=-22 {-10x+2(5x-11)=-22 {-10x+10x-22=-22 {0=0
ответ: (0; -11)