f(-1)=8-9

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Solution for f(-1)=8-9 equation: 


Simplifying
f(-1) = 8 + -9

Reorder the terms for easier multiplication:
-1f = 8 + -9

Combine like terms: 8 + -9 = -1
-1f = -1

Solving
-1f = -1

Solving for variable 'f'.

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

Divide each side by '-1'.
f = 1

Simplifying
f = 1

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