3(f-9)=-21

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Solution for 3(f-9)=-21 equation: 


Simplifying
3(f + -9) = -21

Reorder the terms:
3(-9 + f) = -21
(-9 * 3 + f * 3) = -21
(-27 + 3f) = -21

Solving
-27 + 3f = -21

Solving for variable 'f'.

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

Add '27' to each side of the equation.
-27 + 27 + 3f = -21 + 27

Combine like terms: -27 + 27 = 0
0 + 3f = -21 + 27
3f = -21 + 27

Combine like terms: -21 + 27 = 6
3f = 6

Divide each side by '3'.
f = 2

Simplifying
f = 2

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