求几道二元一次方程题答案.①{x-3y=2{3x-2y=1②{1-y=3x{2x-5y=-22③{3（x-y)-2(x+y)=-4{5(x+y)-7(x-y)=2④{2x+3y=5{3x+2=10⑤{x-3y=5{4y+2x=11Thanks

求几道二元一次方程题答案.①{x-3y=2{3x-2y=1②{1-y=3x{2x-5y=-22③{3（x-y)-2(x+y)=-4{5(x+y)-7(x-y)=2④{2x+3y=5{3x+2=10⑤{x-3y=5{4y+2x=11Thanks
求几道二元一次方程题答案.
①{x-3y=2
{3x-2y=1
②{1-y=3x
{2x-5y=-22
③{3（x-y)-2(x+y)=-4
{5(x+y)-7(x-y)=2
④{2x+3y=5
{3x+2=10
⑤{x-3y=5
{4y+2x=11
Thanks

求几道二元一次方程题答案.①{x-3y=2{3x-2y=1②{1-y=3x{2x-5y=-22③{3（x-y)-2(x+y)=-4{5(x+y)-7(x-y)=2④{2x+3y=5{3x+2=10⑤{x-3y=5{4y+2x=11Thanks
1.y=-7/5 x=-7/1