解二元一次方程组x+y x-y--- + -----=63 23(x+y)-2(x-y)=28 - 唯久问答

解二元一次方程组x+y x-y--- + -----=63 23(x+y)-2(x-y)=28

2019-05-28

解二元一次方程组
x+y x-y
--- + -----=6
3 2
3(x+y)-2(x-y)=28

优质解答

3(X+Y)-2(X-Y)=28
3X+3Y-2X+2Y=28
X+5Y=28 3(X+Y)-2(X-Y)=28
3X+3Y-2X+2Y=28
X+5Y=28

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