f(x)=7.5x-20

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Solution for f(x)=7.5x-20 equation: 


Simplifying
f(x) = 7.5x + -20

Multiply f * x
fx = 7.5x + -20

Reorder the terms:
fx = -20 + 7.5x

Solving
fx = -20 + 7.5x

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 + 7.5

Simplifying
f = -20x-1 + 7.5

Reorder the terms:
f = 7.5 + -20x-1

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