Well if you dont specify the exact value of n, then its (n + 6)
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N/6 -3 = 10 N/6 = 13 ( add 3 to each side)N = 78 (Multiply each side by 6)
N - 6 < -4 Add 6 to each side of the inequality :N < 2 .
n + 7 = 4*6 n + 7 = 24 n = 24 - 7 = 17.
In mathematical terms the problem is :- 3n + 6 = 20 + n 3n - n = 20 - 6 2n = 14 n = 7
6+N3 is the sum of N*3 then you add six. 6*N3 is you multiply 6 times three times N times three.