(f-3)=-21

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Solution for (f-3)=-21 equation: 


Simplifying
(f + -3) = -21

Reorder the terms:
(-3 + f) = -21

Remove parenthesis around (-3 + f)
-3 + f = -21

Solving
-3 + f = -21

Solving for variable 'f'.

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

Add '3' to each side of the equation.
-3 + 3 + f = -21 + 3

Combine like terms: -3 + 3 = 0
0 + f = -21 + 3
f = -21 + 3

Combine like terms: -21 + 3 = -18
f = -18

Simplifying
f = -18

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