(x-1/2)/1,6=-4
x-1/2=-4*1,6
x-1/2=-6,4
x=-64/10+5/10(am amplificat 1/2 cu 5)
x=59/10
x=5,9
(x-2/3):8/5=-4
(x-2/3)·5/8=-4
5/8x- 5/12=-4
15x-10=-96
15x=-96+10
15x=86
x=86/15
