f(x)=-7x-8

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Solution for f(x)=-7x-8 equation: 


Simplifying
f(x) = -7x + -8

Multiply f * x
fx = -7x + -8

Reorder the terms:
fx = -8 + -7x

Solving
fx = -8 + -7x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -8x-1 + -7

Simplifying
f = -8x-1 + -7

Reorder the terms:
f = -7 + -8x-1

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