3x+1+2 = 5x+1
3x+1-4 = -x+1
4+x-3x = 4-2x
4+x-2x = 4-x
[tex]\frac{1}{2}x+5-2= \frac{1}{2}x+3[/tex]
[tex]\frac{1}{2}x+4-7=\frac{1}{2}x-3[/tex]
1,5x+2-0,5x-1=x+1
-1,5x+3+3,5x+1=2x+4
