7f-4-2f=31

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Solution for 7f-4-2f=31 equation: 


Simplifying
7f + -4 + -2f = 31

Reorder the terms:
-4 + 7f + -2f = 31

Combine like terms: 7f + -2f = 5f
-4 + 5f = 31

Solving
-4 + 5f = 31

Solving for variable 'f'.

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

Add '4' to each side of the equation.
-4 + 4 + 5f = 31 + 4

Combine like terms: -4 + 4 = 0
0 + 5f = 31 + 4
5f = 31 + 4

Combine like terms: 31 + 4 = 35
5f = 35

Divide each side by '5'.
f = 7

Simplifying
f = 7

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