N+(N+1)+(N+2)=15

Solution for N+(N+1)+(N+2)=15 equation:

Simplifying
N + (N + 1) + (N + 2) = 15

Reorder the terms:
N + (1 + N) + (N + 2) = 15

Remove parenthesis around (1 + N)
N + 1 + N + (N + 2) = 15

Reorder the terms:
N + 1 + N + (2 + N) = 15

Remove parenthesis around (2 + N)
N + 1 + N + 2 + N = 15

Reorder the terms:
1 + 2 + N + N + N = 15

Combine like terms: 1 + 2 = 3
3 + N + N + N = 15

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

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

Solving
3 + 3N = 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 + 3N = 15 + -3

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

Combine like terms: 15 + -3 = 12
3N = 12

Divide each side by '3'.
N = 4

Simplifying
N = 4