5x-1＜3x+3
5x-3x＜3+1
2x＜4 x＜2
4x-1-3（5x+1）≤1
4x-1-15x-3≤1
-11x-4≤1
-11x≤1+4
-11x≤5
x≥-11分之5
-11分之5≤x＜2