97-21f=685

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Solution for 97-21f=685 equation: 


Simplifying
97 + -21f = 685

Solving
97 + -21f = 685

Solving for variable 'f'.

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

Add '-97' to each side of the equation.
97 + -97 + -21f = 685 + -97

Combine like terms: 97 + -97 = 0
0 + -21f = 685 + -97
-21f = 685 + -97

Combine like terms: 685 + -97 = 588
-21f = 588

Divide each side by '-21'.
f = -28

Simplifying
f = -28

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