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 = 18
f = 18

Simplifying
f = 18

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