3f+120=20-1f

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Solution for 3f+120=20-1f equation: 


Simplifying
3f + 120 = 20 + -1f

Reorder the terms:
120 + 3f = 20 + -1f

Solving
120 + 3f = 20 + -1f

Solving for variable 'f'.

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

Add 'f' to each side of the equation.
120 + 3f + f = 20 + -1f + f

Combine like terms: 3f + f = 4f
120 + 4f = 20 + -1f + f

Combine like terms: -1f + f = 0
120 + 4f = 20 + 0
120 + 4f = 20

Add '-120' to each side of the equation.
120 + -120 + 4f = 20 + -120

Combine like terms: 120 + -120 = 0
0 + 4f = 20 + -120
4f = 20 + -120

Combine like terms: 20 + -120 = -100
4f = -100

Divide each side by '4'.
f = -25

Simplifying
f = -25

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