f(x)-x=12

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Solution for f(x)-x=12 equation: 


Simplifying
f(x) + -1x = 12

Multiply f * x
fx + -1x = 12

Solving
fx + -1x = 12

Solving for variable 'f'.

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

Add 'x' to each side of the equation.
fx + -1x + x = 12 + x

Combine like terms: -1x + x = 0
fx + 0 = 12 + x
fx = 12 + x

Divide each side by 'x'.
f = 12x-1 + 1

Simplifying
f = 12x-1 + 1

Reorder the terms:
f = 1 + 12x-1

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