f(8)=21

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Solution for f(8)=21 equation: 


Simplifying
f(8) = 21

Reorder the terms for easier multiplication:
8f = 21

Solving
8f = 21

Solving for variable 'f'.

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

Divide each side by '8'.
f = 2.625

Simplifying
f = 2.625

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