f-20=45

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Solution for f-20=45 equation: 


Simplifying
f + -20 = 45

Reorder the terms:
-20 + f = 45

Solving
-20 + f = 45

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 + f = 45 + 20

Combine like terms: -20 + 20 = 0
0 + f = 45 + 20
f = 45 + 20

Combine like terms: 45 + 20 = 65
f = 65

Simplifying
f = 65

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