x/2+y/3=-3与 7x=8y-4求X、Y,
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x/2+y/3=-3与 7x=8y-4求X、Y,
x/2+y/3=-3与 7x=8y-4求X、Y,
x/2+y/3=-3与 7x=8y-4求X、Y,
x/2+y/3=-3 方程两边同时乘以24得:12x+8y=-72
7x=8y-4 可得8y=7x+4 代入上式得12x+7x+4=-72 19x+4=-72 x=-4