4=15-f

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Solution for 4=15-f equation: 


Simplifying
4 = 15 + -1f

Solving
4 = 15 + -1f

Solving for variable 'f'.

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

Add 'f' to each side of the equation.
4 + f = 15 + -1f + f

Combine like terms: -1f + f = 0
4 + f = 15 + 0
4 + f = 15

Add '-4' to each side of the equation.
4 + -4 + f = 15 + -4

Combine like terms: 4 + -4 = 0
0 + f = 15 + -4
f = 15 + -4

Combine like terms: 15 + -4 = 11
f = 11

Simplifying
f = 11

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