n = 1/7
7n + 1 = 6n + 8 7n=6n+7 (minus 1 from each side) n=7 (7n-6n equals n, you are left with n=7)
7n = 91n = 91÷7n = 13
(10, 2)
7n - 2 + 3n + 4 = 7n + 3n - 2 + 4 = 10n + 2 which can be simplified to 2(5n +1)
n = 3Solution:7n/21 = 17n = 1 * 217n = 21n = 21/7n = 3
7n = 28n = 28/7 = 4
7n(n−1)
2 - 7n = 6therefore 7n = 2 - 6 = -4 and so n = -4/7 Then 5m + 7n = 6.4 becomes 5m - 4 = 6.4 so that 5m = 10.4 and then m = 10.4/5 = 2.08
7n = 7 divide by 7 on both sides n = 7
7n-6 = 1
9n-2=7n+50 7n+9n=50+2 16n=52 n= 3.25
1 - 7n = 15 - 5n Add 5n to each side: 1 - 7n + 5n = 15 -5n + 5n ie 1 - 2n = 15; subtract 1 from each side: -2n = 14 divide both sides by -2: n = -7