∵5x-2m=3x-6m+1 5x-3x=﹣6m+1+2m 2x=﹣4m+1 x=﹣2m+1/2 ∵﹣3<x<4 ∴﹣3<﹣2m+1/2<4 ∴﹣7/4<m<7/4 ∴m必须在﹣7/4<m<7/4取值.