n+n-2+n-2-4=31

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Solution for n+n-2+n-2-4=31 equation:


Simplifying
n + n + -2 + n + -2 + -4 = 31

Reorder the terms:
-2 + -2 + -4 + n + n + n = 31

Combine like terms: -2 + -2 = -4
-4 + -4 + n + n + n = 31

Combine like terms: -4 + -4 = -8
-8 + n + n + n = 31

Combine like terms: n + n = 2n
-8 + 2n + n = 31

Combine like terms: 2n + n = 3n
-8 + 3n = 31

Solving
-8 + 3n = 31

Solving for variable 'n'.

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

Add '8' to each side of the equation.
-8 + 8 + 3n = 31 + 8

Combine like terms: -8 + 8 = 0
0 + 3n = 31 + 8
3n = 31 + 8

Combine like terms: 31 + 8 = 39
3n = 39

Divide each side by '3'.
n = 13

Simplifying
n = 13

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