1)2 х+1<3 х+3
2x-3x<3-1
-x<2
x>-2
2)-1+х<2 х+3
x-2x<3+1
-x<4
x>-4
3)-2 х+1<3 х+3
-2x-3x<3-1
-5x<2
x>-2/5
4)3 х+1<2 х+3
3x-2x<3-1
x<2
1)2 х+1<3 х+3
2x-3x<3-1
-x<2
x>-2
2)-1+х<2 х+3
x-2x<3+1
-x<4
x>-4
3)-2 х+1<3 х+3
-2x-3x<3-1
-5x<2
x>-2/5
4)3 х+1<2 х+3
3x-2x<3-1
x<2