It is n/7.
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n=-4/3
n ___ = 3 2+5 n = 3(2+5) n = 3(7) n = 21
(61+n)/(78+n)=4/5 Solving for n gives n=7
7 + n = 14 n = 7
9/6 = 21/n3/2 = 21/n Since 3 x 7 = 21, then n must be 14 (2 x 7) and we have:3/2 = 21/14 or 9/6 = 21/14.