n-3+2n=12

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Solution for n-3+2n=12 equation: 


Simplifying
n + -3 + 2n = 12

Reorder the terms:
-3 + n + 2n = 12

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

Solving
-3 + 3n = 12

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 + 3n = 12 + 3

Combine like terms: -3 + 3 = 0
0 + 3n = 12 + 3
3n = 12 + 3

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

Divide each side by '3'.
n = 5

Simplifying
n = 5

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