f(-1)=9x+4

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Solution for f(-1)=9x+4 equation: 


Simplifying
f(-1) = 9x + 4

Reorder the terms for easier multiplication:
-1f = 9x + 4

Reorder the terms:
-1f = 4 + 9x

Solving
-1f = 4 + 9x

Solving for variable 'f'.

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

Divide each side by '-1'.
f = -4 + -9x

Simplifying
f = -4 + -9x

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