30=-2+f+20

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Solution for 30=-2+f+20 equation:


Simplifying
30 = -2 + f + 20

Reorder the terms:
30 = -2 + 20 + f

Combine like terms: -2 + 20 = 18
30 = 18 + f

Solving
30 = 18 + f

Solving for variable 'f'.

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

Add '-1f' to each side of the equation.
30 + -1f = 18 + f + -1f

Combine like terms: f + -1f = 0
30 + -1f = 18 + 0
30 + -1f = 18

Add '-30' to each side of the equation.
30 + -30 + -1f = 18 + -30

Combine like terms: 30 + -30 = 0
0 + -1f = 18 + -30
-1f = 18 + -30

Combine like terms: 18 + -30 = -12
-1f = -12

Divide each side by '-1'.
f = 12

Simplifying
f = 12

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