5X+y=2,X-3y=4的解,
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5X+y=2,X-3y=4的解,
y=2-5x,,,x-3(2-5x)=4,,x-6+15x=4,,x=5/8,y=-9/8
y=2-5X,X-3*(2-5X)=4,X—6+15X=4,16X=10,X=5/8,y=-9/8。
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