5f+7f+3y=30

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Solution for 5f+7f+3y=30 equation: 


Simplifying
5f + 7f + 3y = 30

Combine like terms: 5f + 7f = 12f
12f + 3y = 30

Solving
12f + 3y = 30

Solving for variable 'f'.

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

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

Combine like terms: 3y + -3y = 0
12f + 0 = 30 + -3y
12f = 30 + -3y

Divide each side by '12'.
f = 2.5 + -0.25y

Simplifying
f = 2.5 + -0.25y

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