12-18f+f=-5(7f+9)+15f

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Solution for 12-18f+f=-5(7f+9)+15f equation:


Simplifying
12 + -18f + f = -5(7f + 9) + 15f

Combine like terms: -18f + f = -17f
12 + -17f = -5(7f + 9) + 15f

Reorder the terms:
12 + -17f = -5(9 + 7f) + 15f
12 + -17f = (9 * -5 + 7f * -5) + 15f
12 + -17f = (-45 + -35f) + 15f

Combine like terms: -35f + 15f = -20f
12 + -17f = -45 + -20f

Solving
12 + -17f = -45 + -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.
12 + -17f + 20f = -45 + -20f + 20f

Combine like terms: -17f + 20f = 3f
12 + 3f = -45 + -20f + 20f

Combine like terms: -20f + 20f = 0
12 + 3f = -45 + 0
12 + 3f = -45

Add '-12' to each side of the equation.
12 + -12 + 3f = -45 + -12

Combine like terms: 12 + -12 = 0
0 + 3f = -45 + -12
3f = -45 + -12

Combine like terms: -45 + -12 = -57
3f = -57

Divide each side by '3'.
f = -19

Simplifying
f = -19

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