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