15-f=2(f+3)

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Solution for 15-f=2(f+3) equation:


Simplifying
15 + -1f = 2(f + 3)

Reorder the terms:
15 + -1f = 2(3 + f)
15 + -1f = (3 * 2 + f * 2)
15 + -1f = (6 + 2f)

Solving
15 + -1f = 6 + 2f

Solving for variable 'f'.

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

Add '-2f' to each side of the equation.
15 + -1f + -2f = 6 + 2f + -2f

Combine like terms: -1f + -2f = -3f
15 + -3f = 6 + 2f + -2f

Combine like terms: 2f + -2f = 0
15 + -3f = 6 + 0
15 + -3f = 6

Add '-15' to each side of the equation.
15 + -15 + -3f = 6 + -15

Combine like terms: 15 + -15 = 0
0 + -3f = 6 + -15
-3f = 6 + -15

Combine like terms: 6 + -15 = -9
-3f = -9

Divide each side by '-3'.
f = 3

Simplifying
f = 3

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