3 + 3n = 9 + 2n + 4n n = -2
The sum of the numbers given is 31. 1 + 2 + 4 + 8 + ... + 2n = 2n+1 - 1
4n
n= -2
12+4n = 2n12+4n-4n = 2n-4n12 = -2n-1/2(12 = -2n)-6 = n
That factors to (2n + 1)(n + 2)
7+2n
18n + 27 or 9(2n + 3)
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
4n
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
2n plus 4 = 2n + 4