f+13=20

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Solution for f+13=20 equation: 


Simplifying
f + 13 = 20

Reorder the terms:
13 + f = 20

Solving
13 + f = 20

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 + f = 20 + -13

Combine like terms: 13 + -13 = 0
0 + f = 20 + -13
f = 20 + -13

Combine like terms: 20 + -13 = 7
f = 7

Simplifying
f = 7

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