(m-2)x+3=11-m(3-x)
mx-2x+3=11-3m+mx
2x=-8+3m
x=(-8+3m)/2
(1)有正数解
x>0
(-8+3m)/2>0
-8+3m>0
3m>8
x>8/3
(2)有负数解
x