f(x)=4x+5x-9

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Solution for f(x)=4x+5x-9 equation: 


Simplifying
f(x) = 4x + 5x + -9

Multiply f * x
fx = 4x + 5x + -9

Reorder the terms:
fx = -9 + 4x + 5x

Combine like terms: 4x + 5x = 9x
fx = -9 + 9x

Solving
fx = -9 + 9x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -9x-1 + 9

Simplifying
f = -9x-1 + 9

Reorder the terms:
f = 9 + -9x-1

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