f+3=15

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Solution for f+3=15 equation: 


Simplifying
f + 3 = 15

Reorder the terms:
3 + f = 15

Solving
3 + f = 15

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 + f = 15 + -3

Combine like terms: 3 + -3 = 0
0 + f = 15 + -3
f = 15 + -3

Combine like terms: 15 + -3 = 12
f = 12

Simplifying
f = 12

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