f(2x)=13

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Solution for f(2x)=13 equation: 


Simplifying
f(2x) = 13

Remove parenthesis around (2x)
f * 2x = 13

Reorder the terms for easier multiplication:
2f * x = 13

Multiply f * x
2fx = 13

Solving
2fx = 13

Solving for variable 'f'.

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

Divide each side by '2x'.
f = 6.5x-1

Simplifying
f = 6.5x-1

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