作业帮2x+3y=58 2x+2y=76
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2x+3y=58 2x+2y=76
2x+3y=58 2x+2y=76
2x+3y=58 2x+2y=76
2x+2y=76
方程两边同除以2得x+y=38
x=38-y 把x=38-y 带入2x+3y=58得2（38-y)+3y=58 76-2y+3y=58 y=58-76=-18 把y=18带入x+y=38得x=38-y=38-(-18)=38+18=56
所以x=56,y=-18
小朋友要多动脑多思考
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