f(1)=20-1

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Solution for f(1)=20-1 equation: 


Simplifying
f(1) = 20 + -1

Reorder the terms for easier multiplication:
1f = 20 + -1

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

Solving
1f = 19

Solving for variable 'f'.

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

Divide each side by '1'.
f = 19

Simplifying
f = 19

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