21-4f=7f

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Solution for 21-4f=7f equation:


Simplifying
21 + -4f = 7f

Solving
21 + -4f = 7f

Solving for variable 'f'.

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

Add '-7f' to each side of the equation.
21 + -4f + -7f = 7f + -7f

Combine like terms: -4f + -7f = -11f
21 + -11f = 7f + -7f

Combine like terms: 7f + -7f = 0
21 + -11f = 0

Add '-21' to each side of the equation.
21 + -21 + -11f = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -11f = 0 + -21
-11f = 0 + -21

Combine like terms: 0 + -21 = -21
-11f = -21

Divide each side by '-11'.
f = 1.909090909

Simplifying
f = 1.909090909

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