(x+y)/2=6-(x-y)/3
3(x+y)=6*6-2(x-y)
3x+3y=36-2x+2y
5x+y=36 (1)
4(x+y)-5(x-y)=2
4x+4y-5x+5y=2
-x+9y=2 (2)
由（1）+（2）*5得
5x+y+5(-x+9y)=36+2*5
46y=46
解得
y=1
x=7
解方程组{x+y/2=6-x-y/3,4(x+y)-5(x-y)=2 怎么解呢
1个回答
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