6(x-10)=y-102(x+10)=y+10
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6(x-10)=y-102(x+10)=y+10
6(x-10)=y-10
2(x+10)=y+10
6(x-10)=y-102(x+10)=y+10
6(x-10)=y-10 (1)
2(x+10)=y+10 (2)
(1)-(2)
6(x-10)-2(x+10)=y-10-y-10
6x-60-2x-20=-20
4x=60
x=15
代入(1)
6(15-10)=y-10
y=30+10
所以x=15,y=40
2式-1式 -4x+80=20 x=15
所以y=40