n+3+n=15

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Solution for n+3+n=15 equation: 


Simplifying
n + 3 + n = 15

Reorder the terms:
3 + n + n = 15

Combine like terms: n + n = 2n
3 + 2n = 15

Solving
3 + 2n = 15

Solving for variable 'n'.

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

Add '-3' to each side of the equation.
3 + -3 + 2n = 15 + -3

Combine like terms: 3 + -3 = 0
0 + 2n = 15 + -3
2n = 15 + -3

Combine like terms: 15 + -3 = 12
2n = 12

Divide each side by '2'.
n = 6

Simplifying
n = 6

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