15=2[n+(n+1)]-[(n+2)+(n+3)]

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Solution for 15=2[n+(n+1)]-[(n+2)+(n+3)] equation:


Simplifying
15 = 2[n + (n + 1)] + -1[(n + 2) + (n + 3)]

Reorder the terms:
15 = 2[n + (1 + n)] + -1[(n + 2) + (n + 3)]

Remove parenthesis around (1 + n)
15 = 2[n + 1 + n] + -1[(n + 2) + (n + 3)]

Reorder the terms:
15 = 2[1 + n + n] + -1[(n + 2) + (n + 3)]

Combine like terms: n + n = 2n
15 = 2[1 + 2n] + -1[(n + 2) + (n + 3)]
15 = [1 * 2 + 2n * 2] + -1[(n + 2) + (n + 3)]
15 = [2 + 4n] + -1[(n + 2) + (n + 3)]

Reorder the terms:
15 = 2 + 4n + -1[(2 + n) + (n + 3)]

Remove parenthesis around (2 + n)
15 = 2 + 4n + -1[2 + n + (n + 3)]

Reorder the terms:
15 = 2 + 4n + -1[2 + n + (3 + n)]

Remove parenthesis around (3 + n)
15 = 2 + 4n + -1[2 + n + 3 + n]

Reorder the terms:
15 = 2 + 4n + -1[2 + 3 + n + n]

Combine like terms: 2 + 3 = 5
15 = 2 + 4n + -1[5 + n + n]

Combine like terms: n + n = 2n
15 = 2 + 4n + -1[5 + 2n]
15 = 2 + 4n + [5 * -1 + 2n * -1]
15 = 2 + 4n + [-5 + -2n]

Reorder the terms:
15 = 2 + -5 + 4n + -2n

Combine like terms: 2 + -5 = -3
15 = -3 + 4n + -2n

Combine like terms: 4n + -2n = 2n
15 = -3 + 2n

Solving
15 = -3 + 2n

Solving for variable 'n'.

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

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

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

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

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

Combine like terms: -3 + -15 = -18
-2n = -18

Divide each side by '-2'.
n = 9

Simplifying
n = 9

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