-F+20=15

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Solution for -F+20=15 equation: 


Simplifying
-1F + 20 = 15

Reorder the terms:
20 + -1F = 15

Solving
20 + -1F = 15

Solving for variable 'F'.

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

Add '-20' to each side of the equation.
20 + -20 + -1F = 15 + -20

Combine like terms: 20 + -20 = 0
0 + -1F = 15 + -20
-1F = 15 + -20

Combine like terms: 15 + -20 = -5
-1F = -5

Divide each side by '-1'.
F = 5

Simplifying
F = 5

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