15f-8f-13=-55

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Solution for 15f-8f-13=-55 equation:


Simplifying
15f + -8f + -13 = -55

Reorder the terms:
-13 + 15f + -8f = -55

Combine like terms: 15f + -8f = 7f
-13 + 7f = -55

Solving
-13 + 7f = -55

Solving for variable 'f'.

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

Add '13' to each side of the equation.
-13 + 13 + 7f = -55 + 13

Combine like terms: -13 + 13 = 0
0 + 7f = -55 + 13
7f = -55 + 13

Combine like terms: -55 + 13 = -42
7f = -42

Divide each side by '7'.
f = -6

Simplifying
f = -6

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