解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。

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解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。

解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。
解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+16
10(x-y)=3(x+y)+15
6(x+y)=4(2x-y)+16
分开的。

解方程组 10(x-y)=3(x+y)+15 6(x+y)=4(2x-y)+1610(x-y)=3(x+y)+156(x+y)=4(2x-y)+16分开的。
10x-10y=3x+3y+15
7x=13y+15
x=13/7y+15/7
把x转换成y代入方程得出y,再由y算出x
下题同理

整理得7x-13y=15
x+5y=-8
解得 x=-29/48
y=-71/48

10(x-y)=3(x+y)+15
6(x+y)=4(2x-y)+16
化简得7x-13y=15,①
x-5y=-8,②
①-②*7,22y=71,y=71/22,
代入②,x=179/22,