15-f=-4

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Solution for 15-f=-4 equation: 


Simplifying
15 + -1f = -4

Solving
15 + -1f = -4

Solving for variable 'f'.

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

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

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

Combine like terms: -4 + -15 = -19
-1f = -19

Divide each side by '-1'.
f = 19

Simplifying
f = 19

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