n+2n-6=15

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Solution for n+2n-6=15 equation: 


Simplifying
n + 2n + -6 = 15

Reorder the terms:
-6 + n + 2n = 15

Combine like terms: n + 2n = 3n
-6 + 3n = 15

Solving
-6 + 3n = 15

Solving for variable 'n'.

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

Add '6' to each side of the equation.
-6 + 6 + 3n = 15 + 6

Combine like terms: -6 + 6 = 0
0 + 3n = 15 + 6
3n = 15 + 6

Combine like terms: 15 + 6 = 21
3n = 21

Divide each side by '3'.
n = 7

Simplifying
n = 7

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