(1) 3(X-1)=Y+5 ①5(Y-1)=3(X+5)②

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(1)3(X-1)=Y+5①5(Y-1)=3(X+5)②(1)3(X-1)=Y+5①5(Y-1)=3(X+5)②(1)3(X-1)=Y+5①5(Y-1)=3(X+5)②x=5y=73x-3=y+5整理

(1) 3(X-1)=Y+5 ①5(Y-1)=3(X+5)②
(1) 3(X-1)=Y+5 ①
5(Y-1)=3(X+5)②

(1) 3(X-1)=Y+5 ①5(Y-1)=3(X+5)②

x=5y=7

3x-3=y+5整理3x=y+5+3=y+8

5y-5=3x+15整理3x=5y-5-15=5y-20

所以y+8=5y-20
28=4y
y=7
x=5

x=5 y=7

①+②得
3(x-1)+5(y-1)=y+5+3(x+5)
通过去括号,移向,合并同类项得
y=7
把y=7代人①中,可得
x=5