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9n+9=81 9n=72 n=8
If 9n = 36 then we divide both sides by 9 to discover what value n has If we divide 9n by 9 we get n If we divide 36 by 9 we get 4 so, if 9n = 36 the n = 4
The equation "9n equals 126" can be written as 9n = 126.
9n + 18 = 81 9n = 63 n = 7
n2 + 9n + 18 = (n + 6)(n + 3)