f(2a)=x+9

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Solution for f(2a)=x+9 equation: 


Simplifying
f(2a) = x + 9

Remove parenthesis around (2a)
f * 2a = x + 9

Reorder the terms for easier multiplication:
2f * a = x + 9

Multiply f * a
2af = x + 9

Reorder the terms:
2af = 9 + x

Solving
2af = 9 + x

Solving for variable 'a'.

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

Divide each side by '2f'.
a = 4.5f-1 + 0.5f-1x

Simplifying
a = 4.5f-1 + 0.5f-1x

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