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3n-11 = 19 3n = 19+11 3n = 30 Divide both sides of the equation by 3 to find the value of n: n = 10
3n - 2 = -10 3n = -10+2 = -8 n = -8/3 or -22/3
6n - 4 - 3 = 3n + 10 + 4n -7 = 7n - 6n + 10 -17 = n
The Series has the formula 3n + 1/2(n - 1)(n - 2) = 3n + 1/2(n2 - 3n + 2) which simplifies to, 1/2(n2 +3n + 2)
n = 14/3