解方程 {3x+5y=12 {3x+6y=-11 {x+y/3+x-y/2=63(x+y)-2(x-y)=28

问题描述:

解方程 {3x+5y=12 {3x+6y=-11 {
x+y/3+x-y/2=6
3(x+y)-2(x-y)=28

x=59,y=-33