3f+8-2f+9=20

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Solution for 3f+8-2f+9=20 equation:


Simplifying
3f + 8 + -2f + 9 = 20

Reorder the terms:
8 + 9 + 3f + -2f = 20

Combine like terms: 8 + 9 = 17
17 + 3f + -2f = 20

Combine like terms: 3f + -2f = 1f
17 + 1f = 20

Solving
17 + 1f = 20

Solving for variable 'f'.

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

Add '-17' to each side of the equation.
17 + -17 + 1f = 20 + -17

Combine like terms: 17 + -17 = 0
0 + 1f = 20 + -17
1f = 20 + -17

Combine like terms: 20 + -17 = 3
1f = 3

Divide each side by '1'.
f = 3

Simplifying
f = 3

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