f(x)=20-0.5x

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Solution for f(x)=20-0.5x equation: 


Simplifying
f(x) = 20 + -0.5x

Multiply f * x
fx = 20 + -0.5x

Solving
fx = 20 + -0.5x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = 20x-1 + -0.5

Simplifying
f = 20x-1 + -0.5

Reorder the terms:
f = -0.5 + 20x-1

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