-3f+12=-21

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Solution for -3f+12=-21 equation: 


Simplifying
-3f + 12 = -21

Reorder the terms:
12 + -3f = -21

Solving
12 + -3f = -21

Solving for variable 'f'.

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

Add '-12' to each side of the equation.
12 + -12 + -3f = -21 + -12

Combine like terms: 12 + -12 = 0
0 + -3f = -21 + -12
-3f = -21 + -12

Combine like terms: -21 + -12 = -33
-3f = -33

Divide each side by '-3'.
f = 11

Simplifying
f = 11

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