is eassy
3n.
5+n+3 = 8+n
That would be 18+n. 5+3+2 = 5+3+n 10 = 8 + n 10-8 = n 2 = n and if you substitute 2 for n then you see that 5+3+2 = 5+3+2
n - 10 + 9n - 3 n + 9n - 10 - 3 10n - 13
Combine like terms to give 3n + 2
(n2 + n)/2 1+2+3+4+5+n= 15+n
If you mean: -3(n+5) = 12 then n works out as -9 because -3(-9+5) = 12
3n + 9 = 3(n + 3)
2.3 + n + 1.4 = n + 3.7
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n ___ = 3 2+5 n = 3(2+5) n = 3(7) n = 21