已知k=(y-n)/(x-m),(k不等于0),求x.
问题描述：
已知k=(y-n)/(x-m),(k不等于0),求x.
答
k=(y-n)/(x-m)
(x-m)*k=y-n
x-m=1/K *(y-n)
x=(y-n)/k +m