This equation has no value, as the value of n could be anything, giving this equation an infinite number of answers. To answer this equation, you either need to know what n is, or have an equals sign.
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2n + 8 = -142n = -22n = -11
14-2n = 12
You can't. 17 + 2n = 21 + 2n gives: 2n = 4 + 2n which gives 0=4 which is not possible so the sum is not solveable.
Exactly that. 2n+2.
(2n + 7)(2n + 7)