3(7+5f)=66

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Solution for 3(7+5f)=66 equation: 


Simplifying
3(7 + 5f) = 66
(7 * 3 + 5f * 3) = 66
(21 + 15f) = 66

Solving
21 + 15f = 66

Solving for variable 'f'.

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

Add '-21' to each side of the equation.
21 + -21 + 15f = 66 + -21

Combine like terms: 21 + -21 = 0
0 + 15f = 66 + -21
15f = 66 + -21

Combine like terms: 66 + -21 = 45
15f = 45

Divide each side by '15'.
f = 3

Simplifying
f = 3

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