Question

(x+y)/4=(x-y)/5=(3x-2y+5)/6

Answer 1

(x+y)/4=(3x-2y+5)/6 3(x+y)=2(3x-2y+5) 7y=3x+10 (1)

(x+y)/4=(x-y)/5 5 (x+y)=4(x-y) x=-9y (2)

(2)代入(1)得：7y=-27y+10 y=10/34=5/17 代入（2）得 x=-45/17