5(f+2)-f-9-15f=-21

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Solution for 5(f+2)-f-9-15f=-21 equation: 


Simplifying
5(f + 2) + -1f + -9 + -15f = -21

Reorder the terms:
5(2 + f) + -1f + -9 + -15f = -21
(2 * 5 + f * 5) + -1f + -9 + -15f = -21
(10 + 5f) + -1f + -9 + -15f = -21

Reorder the terms:
10 + -9 + 5f + -1f + -15f = -21

Combine like terms: 10 + -9 = 1
1 + 5f + -1f + -15f = -21

Combine like terms: 5f + -1f = 4f
1 + 4f + -15f = -21

Combine like terms: 4f + -15f = -11f
1 + -11f = -21

Solving
1 + -11f = -21

Solving for variable 'f'.

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

Add '-1' to each side of the equation.
1 + -1 + -11f = -21 + -1

Combine like terms: 1 + -1 = 0
0 + -11f = -21 + -1
-11f = -21 + -1

Combine like terms: -21 + -1 = -22
-11f = -22

Divide each side by '-11'.
f = 2

Simplifying
f = 2

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