y+10x=x+y+9 10y+x=y+10x+27
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y+10x=x+y+9 10y+x=y+10x+27
y+10x=x+y+9 10y+x=y+10x+27
y+10x=x+y+9 10y+x=y+10x+27
y+10x=x+y+9
9x=9
x=1
把x=1代入10y+x=y+10x+27得
10y+1=y+10+27
9y=36
y=4
∴x=1
y=4
y+10x=x+y+9 10y+x=y+10x+27
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(x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5
{6/x+y+10/x-y=30 6/x+y-10/x-y=-1
y+y+x=10,x+y+x=8,y=?,x=?
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x+(9-8-y)=10 y+y-(9-8-y)=2 x-y=xx-9.9x xy=11y-1 y=? x=? x+y-xy=?x+(9-8-y)=10y+y-(9-8-y)=2x-y=xx-9.9xxy=11y-1 y=?x=?x+y-xy=?
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