3(f-2)=21

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Solution for 3(f-2)=21 equation: 


Simplifying
3(f + -2) = 21

Reorder the terms:
3(-2 + f) = 21
(-2 * 3 + f * 3) = 21
(-6 + 3f) = 21

Solving
-6 + 3f = 21

Solving for variable 'f'.

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

Add '6' to each side of the equation.
-6 + 6 + 3f = 21 + 6

Combine like terms: -6 + 6 = 0
0 + 3f = 21 + 6
3f = 21 + 6

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

Divide each side by '3'.
f = 9

Simplifying
f = 9

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