n + 16 = 9
n + 16 - 16 = 9 -16 (add 16 to both sides, the equation remains same)
n + 0 = -7
n = -7
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n + 16 = 25 Subtract '16' from both sides. n + 16 - 16 = 25 - 16 Collect terms n = 9
-24
For n+9=18, the answer would be n=9 because n+9=18 also mean 18-9=n so 18-9=9
n - 16 = 2n + 12 + 3nCombine the 'n' terms on the right side:n - 16 = 5n + 12Subtract 'n' from each side:-16 = 4n + 12Subtract 12 from each side:-28 = 4nDivide each side by 4:-7 = n
2 plus n is the true one, but 1 plus n is not?