f(x)=x-4

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Solution for f(x)=x-4 equation: 


Simplifying
f(x) = x + -4

Multiply f * x
fx = x + -4

Reorder the terms:
fx = -4 + x

Solving
fx = -4 + x

Solving for variable 'f'.

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

Divide each side by 'x'.
f = -4x-1 + 1

Simplifying
f = -4x-1 + 1

Reorder the terms:
f = 1 + -4x-1

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