f-12-f-15=25

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Solution for f-12-f-15=25 equation: 


Simplifying
f + -12 + -1f + -15 = 25

Reorder the terms:
-12 + -15 + f + -1f = 25

Combine like terms: -12 + -15 = -27
-27 + f + -1f = 25

Combine like terms: f + -1f = 0
-27 + 0 = 25
-27 = 25

Solving
-27 = 25

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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