80=p-0.2p

Solution for 80=p-0.2p equation:

Simplifying
80 = p + -0.2p

Combine like terms: p + -0.2p = 0.8p
80 = 0.8p

Solving
80 = 0.8p

Solving for variable 'p'.

Move all terms containing p to the left, all other terms to the right.

Add '-0.8p' to each side of the equation.
80 + -0.8p = 0.8p + -0.8p

Combine like terms: 0.8p + -0.8p = 0.0
80 + -0.8p = 0.0

Add '-80' to each side of the equation.
80 + -80 + -0.8p = 0.0 + -80

Combine like terms: 80 + -80 = 0
0 + -0.8p = 0.0 + -80
-0.8p = 0.0 + -80

Combine like terms: 0.0 + -80 = -80
-0.8p = -80

Divide each side by '-0.8'.
p = 100

Simplifying
p = 100