20-F=17

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Solution for 20-F=17 equation: 


Simplifying
20 + -1F = 17

Solving
20 + -1F = 17

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 = 17 + -20

Combine like terms: 20 + -20 = 0
0 + -1F = 17 + -20
-1F = 17 + -20

Combine like terms: 17 + -20 = -3
-1F = -3

Divide each side by '-1'.
F = 3

Simplifying
F = 3

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