5n-2+2=4n
5n=4n
n=0
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n= -2
-4n3 + 8n2 - 4n + 7
12+4n = 2n12+4n-4n = 2n-4n12 = -2n-1/2(12 = -2n)-6 = n
7n + 2 = 4n + 17Subtract 2 from each side:7n = 4n + 15Subtract 4n from each side:3n = 15Divide each side by 3:n = 5
As follows:- 4n+13 = n-8 4n-n = -8-13 3n = -21 n = -7