5x-2m=3x-6m+1
5x-3x=-6m+2m+1
2x=-4m+1
x= (-4m+1)/2
x大于等于2
即,
(-4m+1)/2 ≥2
两边乘以2去分母
-4m+1≥4
1-4m≥4
-4m≥3
m≤-3/4