19=f-20

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Solution for 19=f-20 equation:


Simplifying
19 = f + -20

Reorder the terms:
19 = -20 + f

Solving
19 = -20 + 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.
19 + -1f = -20 + f + -1f

Combine like terms: f + -1f = 0
19 + -1f = -20 + 0
19 + -1f = -20

Add '-19' to each side of the equation.
19 + -19 + -1f = -20 + -19

Combine like terms: 19 + -19 = 0
0 + -1f = -20 + -19
-1f = -20 + -19

Combine like terms: -20 + -19 = -39
-1f = -39

Divide each side by '-1'.
f = 39

Simplifying
f = 39

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