3(3+f)=45

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Solution for 3(3+f)=45 equation: 


Simplifying
3(3 + f) = 45
(3 * 3 + f * 3) = 45
(9 + 3f) = 45

Solving
9 + 3f = 45

Solving for variable 'f'.

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

Add '-9' to each side of the equation.
9 + -9 + 3f = 45 + -9

Combine like terms: 9 + -9 = 0
0 + 3f = 45 + -9
3f = 45 + -9

Combine like terms: 45 + -9 = 36
3f = 36

Divide each side by '3'.
f = 12

Simplifying
f = 12

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