4 $1-0,5x$=-2 $3+2x$

4 - 2x = -6 - 4x

2x - 4x = -6 - 4

-2x = -10

x = 5

5 $x+1,2$=12,5x

5$x+1.2$ = 12.5x

5x + 6 = 12.5x

6 = 7.5x

x = 0.8