3f=20-f

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Solution for 3f=20-f equation:


Simplifying
3f = 20 + -1f

Solving
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.
3f + f = 20 + -1f + f

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

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

Divide each side by '4'.
f = 5

Simplifying
f = 5

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