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Anonymous
If n = 7, then 5n + 4 = 5 x 7 + 4 = 39.
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5n + 7 = -41 5n = -48 n = -48/5 n = -9.6
(5n + 1)(n + 7)
A - B = -3n + 2 - (5n - 7) = -3n + 2 - 5n + 7 = 9 - 8n
-4n3 + 8n2 - 4n + 7
7