75=21+6f

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Solution for 75=21+6f equation:


Simplifying
75 = 21 + 6f

Solving
75 = 21 + 6f

Solving for variable 'f'.

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

Add '-6f' to each side of the equation.
75 + -6f = 21 + 6f + -6f

Combine like terms: 6f + -6f = 0
75 + -6f = 21 + 0
75 + -6f = 21

Add '-75' to each side of the equation.
75 + -75 + -6f = 21 + -75

Combine like terms: 75 + -75 = 0
0 + -6f = 21 + -75
-6f = 21 + -75

Combine like terms: 21 + -75 = -54
-6f = -54

Divide each side by '-6'.
f = 9

Simplifying
f = 9

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