20=f-15

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Solution for 20=f-15 equation:


Simplifying
20 = f + -15

Reorder the terms:
20 = -15 + f

Solving
20 = -15 + f

Solving for variable 'f'.

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

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

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

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 = -35
-1f = -35

Divide each side by '-1'.
f = 35

Simplifying
f = 35

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