80=5(f-81)

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Solution for 80=5(f-81) equation:


Simplifying
80 = 5(f + -81)

Reorder the terms:
80 = 5(-81 + f)
80 = (-81 * 5 + f * 5)
80 = (-405 + 5f)

Solving
80 = -405 + 5f

Solving for variable 'f'.

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

Add '-5f' to each side of the equation.
80 + -5f = -405 + 5f + -5f

Combine like terms: 5f + -5f = 0
80 + -5f = -405 + 0
80 + -5f = -405

Add '-80' to each side of the equation.
80 + -80 + -5f = -405 + -80

Combine like terms: 80 + -80 = 0
0 + -5f = -405 + -80
-5f = -405 + -80

Combine like terms: -405 + -80 = -485
-5f = -485

Divide each side by '-5'.
f = 97

Simplifying
f = 97

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