0
Anonymous
3 + 9 = 12
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If you know that n = 15, substitute 15 for n and solve: n + 3 - 9 15 + 3 - 9 9
3 + 3n = 9 + 2n + 4n n = -2
9
Yes it does. Very good !
10n + 3 = 93 Therefore, 10n = 90 n = 90/10 n = 9