3f-30=5f+12

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Solution for 3f-30=5f+12 equation:


Simplifying
3f + -30 = 5f + 12

Reorder the terms:
-30 + 3f = 5f + 12

Reorder the terms:
-30 + 3f = 12 + 5f

Solving
-30 + 3f = 12 + 5f

Solving for variable 'f'.

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

Add '-5f' to each side of the equation.
-30 + 3f + -5f = 12 + 5f + -5f

Combine like terms: 3f + -5f = -2f
-30 + -2f = 12 + 5f + -5f

Combine like terms: 5f + -5f = 0
-30 + -2f = 12 + 0
-30 + -2f = 12

Add '30' to each side of the equation.
-30 + 30 + -2f = 12 + 30

Combine like terms: -30 + 30 = 0
0 + -2f = 12 + 30
-2f = 12 + 30

Combine like terms: 12 + 30 = 42
-2f = 42

Divide each side by '-2'.
f = -21

Simplifying
f = -21

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