18-3F+13=-20-20F

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Solution for 18-3F+13=-20-20F equation: 


Simplifying
18 + -3F + 13 = -20 + -20F

Reorder the terms:
18 + 13 + -3F = -20 + -20F

Combine like terms: 18 + 13 = 31
31 + -3F = -20 + -20F

Solving
31 + -3F = -20 + -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.
31 + -3F + 20F = -20 + -20F + 20F

Combine like terms: -3F + 20F = 17F
31 + 17F = -20 + -20F + 20F

Combine like terms: -20F + 20F = 0
31 + 17F = -20 + 0
31 + 17F = -20

Add '-31' to each side of the equation.
31 + -31 + 17F = -20 + -31

Combine like terms: 31 + -31 = 0
0 + 17F = -20 + -31
17F = -20 + -31

Combine like terms: -20 + -31 = -51
17F = -51

Divide each side by '17'.
F = -3

Simplifying
F = -3

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