Question

4,2у+0,8=6,2у-(1,1у+0,8)+1,2

Answer 1

4,2у+0.8=6.2у-1,1-0,8+1.2
4.2y-6.2y=-0.8-1.1-0.8+1.2
-2y=1.5
y=1.5:(-2)
y=0.75