f(4)=30

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Solution for f(4)=30 equation: 


Simplifying
f(4) = 30

Reorder the terms for easier multiplication:
4f = 30

Solving
4f = 30

Solving for variable 'f'.

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

Divide each side by '4'.
f = 7.5

Simplifying
f = 7.5

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