4(x-1)=5+y
5(y-1)=4(x-1)+2
两式分别化简整理得到如下:
4x - y = 9 ……①
4x - 5y =-3……②
① - ② 得:4y = 12 即:y = 3
把y = 3代入①得:4x - 3 = 9 得:y = 3
所以 x = y = 3
4(x-1)=5+y
5(y-1)=4(x-1)+2
两式分别化简整理得到如下:
4x - y = 9 ……①
4x - 5y =-3……②
① - ② 得:4y = 12 即:y = 3
把y = 3代入①得:4x - 3 = 9 得:y = 3
所以 x = y = 3