方程 {2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8

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方程 {2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8

方程 {2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8
方程 {2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8

方程 {2x+3y/4+2x-3y/3=7 {2x+3y/3+2x-3y/2=8
2x+3y/4+2x-3y/3=7 ①
2x+3y/3+2x-3y/2=8 ②
①-②,得y/4=-1
解之,得y=-4
把y=-4代入①,得4x+1=7
解之,得x=3/2
∴x=3/2,y=-4