(1)已知a/x+b/y=1(b不等于y),求x; (2)已知K=y-9/x-m(k不等于0),求x.“/...

问题描述:

(1)已知a/x+b/y=1(b不等于y),求x; (2)已知K=y-9/x-m(k不等于0),求x.“/...
(1)已知a/x+b/y=1(b不等于y),求x;
(2)已知K=y-9/x-m(k不等于0),求x.
“/”是分数线

(1)由题意:ay+bx=xy
xy-bx=ay
(y-b)x=ay (b≠y)
x=ay/(y-b)
(2)由题意:kx=xy-9-mx
xy-mx-kx=9
x(y-m-k)=9
x=9/(y-m-k)