n+n-5=21

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Solution for n+n-5=21 equation: 


Simplifying
n + n + -5 = 21

Reorder the terms:
-5 + n + n = 21

Combine like terms: n + n = 2n
-5 + 2n = 21

Solving
-5 + 2n = 21

Solving for variable 'n'.

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

Add '5' to each side of the equation.
-5 + 5 + 2n = 21 + 5

Combine like terms: -5 + 5 = 0
0 + 2n = 21 + 5
2n = 21 + 5

Combine like terms: 21 + 5 = 26
2n = 26

Divide each side by '2'.
n = 13

Simplifying
n = 13

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