21-9f=(-20f-6)

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Solution for 21-9f=(-20f-6) equation:


Simplifying
21 + -9f = (-20f + -6)

Reorder the terms:
21 + -9f = (-6 + -20f)

Remove parenthesis around (-6 + -20f)
21 + -9f = -6 + -20f

Solving
21 + -9f = -6 + -20f

Solving for variable 'f'.

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

Add '20f' to each side of the equation.
21 + -9f + 20f = -6 + -20f + 20f

Combine like terms: -9f + 20f = 11f
21 + 11f = -6 + -20f + 20f

Combine like terms: -20f + 20f = 0
21 + 11f = -6 + 0
21 + 11f = -6

Add '-21' to each side of the equation.
21 + -21 + 11f = -6 + -21

Combine like terms: 21 + -21 = 0
0 + 11f = -6 + -21
11f = -6 + -21

Combine like terms: -6 + -21 = -27
11f = -27

Divide each side by '11'.
f = -2.454545455

Simplifying
f = -2.454545455

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