From question,
4(2−x)=8
⟹8−4x=8 [Applying distributing property]
⟹−4x=8−8=0 [Trasnposing 8 to other side]
⟹x=0−4 [Transposing −4 to other side]
Solve the following equations.
(a) 2 (x + 4) = 12 (b) 3 (n − 5) = 21
(c) 3 (n − 5) = − 21 (d) −4 (2 + x) = 8
(e) 4(2 − x) = 8