Q: What is 2n plus 2 in math?

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Exactly that. 2n+2.

3 + 3n = 9 + 2n + 4n n = -2

The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1

n= -2

12+4n = 2n12+4n-4n = 2n-4n12 = -2n-1/2(12 = -2n)-6 = n

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Exactly that. 2n+2.

That factors to (2n + 1)(n + 2)

7+2n

18n + 27 or 9(2n + 3)

5n + 7 = 28 + 2n (-2n) 3n + 7 = 28 (-7) 3n = 21 therefore, n = 7

15m + (2n-6m) + 11m = = 15m + 11m + 2n - 6m = 26m - 6m + 2n = 20m + 2n = 2(10m + n)

3 + 3n = 9 + 2n + 4n n = -2

The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1

2n + 4m - 2n + m = 5m

Solve for n. 2n+3=0 2n=-3 n=-3/2

1 + 2 + 4 + ... + 2n = 2n+1 - 1

2(2n + 5) = 12 2n + 5 = 6 2n = 1 n = 1/2