12+4n = 2n12+4n-4n = 2n-4n12 = -2n-1/2(12 = -2n)-6 = n
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
3 + 3n = 9 + 2n + 4n n = -2
4n - 2n = 84 2n = 84 n = 42
5n-2+2=4n 5n=4n n=0
12+4n = 2n12+4n-4n = 2n-4n12 = -2n-1/2(12 = -2n)-6 = n
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.
3n + 2n = 7 + 4n 5n = 7 + 4n 5n - 4n = 7 n = 7
3 + 3n = 9 + 2n + 4n n = -2
4n+20=53-2n
2n+2n equals 4n
4n - 2n = 84 2n = 84 n = 42
4n
(4n + 1)*(2n + 6) = 8n2 + 26n + 6
4n - 2n = 18 Therefore, 2n = 18 Therefore, n = 18/2 = 9
5n-2+2=4n 5n=4n n=0
4n