3(2f+1)=21

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Solution for 3(2f+1)=21 equation: 


Simplifying
3(2f + 1) = 21

Reorder the terms:
3(1 + 2f) = 21
(1 * 3 + 2f * 3) = 21
(3 + 6f) = 21

Solving
3 + 6f = 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 + 6f = 21 + -3

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

Combine like terms: 21 + -3 = 18
6f = 18

Divide each side by '6'.
f = 3

Simplifying
f = 3

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