N+2n+n-5=15

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Solution for N+2n+n-5=15 equation:


Simplifying
N + 2n + n + -5 = 15

Reorder the terms:
-5 + N + 2n + n = 15

Combine like terms: 2n + n = 3n
-5 + N + 3n = 15

Solving
-5 + N + 3n = 15

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 + N + 5 + 3n = 15 + 5

Reorder the terms:
-5 + 5 + N + 3n = 15 + 5

Combine like terms: -5 + 5 = 0
0 + N + 3n = 15 + 5
N + 3n = 15 + 5

Combine like terms: 15 + 5 = 20
N + 3n = 20

Add '-3n' to each side of the equation.
N + 3n + -3n = 20 + -3n

Combine like terms: 3n + -3n = 0
N + 0 = 20 + -3n
N = 20 + -3n

Simplifying
N = 20 + -3n

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