50-4.(x-20)= 4.8
50-4x+80=32
130-4x=32
-4x=32-130
-4x=-98
x=(-98):(-4)
x=49/2
50 - 4(x - 20) = 4.8
50 - 4(x - 20) = 32
4(x - 20) = 50 - 32
4(x - 20) = 18
(x- 20) = 18 : 4
x- 20 = 4,5
x = 4,5 + 20
x = 24,5
50-4.(x-20)=4.8
50-4.(x-20)=32
4.(x-20)=50-32
4.(x-20)=18
x-20=18:4
x-20=4,5
x=4,5+20
x=24,5