Subtracting 3n from each side gives 12 = 4n or 4n = 12. n = 12/4 n = 3
4n = 3n + 44n - 3n = 3n - 3n + 4n = 4check:4n = 3n + 44(4) =? 3(4) + 416 =? 12 + 416 = 16 True
3n+18 = 39 -4n 3n+4n = 39 -18 7n = 21 n = 3
3 + 3n = 9 + 2n + 4n n = -2
6n - 4 - 3 = 3n + 10 + 4n -7 = 7n - 6n + 10 -17 = n
Subtracting 3n from each side gives 12 = 4n or 4n = 12. n = 12/4 n = 3
4n = 3n + 44n - 3n = 3n - 3n + 4n = 4check:4n = 3n + 44(4) =? 3(4) + 416 =? 12 + 416 = 16 True
3n+18 = 39 -4n 3n+4n = 39 -18 7n = 21 n = 3
4n-8=3n+2 4n=3n+2+8 4n=3n+10 4n-3n+10 n=10 N = 10
3 + 3n = 9 + 2n + 4n n = -2
-n + 4n = 4n - n = 3n Done!!!!!
6n - 4 - 3 = 3n + 10 + 4n -7 = 7n - 6n + 10 -17 = n
3n + 2n = 7 + 4n 5n = 7 + 4n 5n - 4n = 7 n = 7
3n +2(n+2)= 8+ 4(n+3) 3n +2n +4 = 8+ 4n +12 5n-4n = 20 - 4 n = 16
4n + 3 = 15 4n +3 - 3 = 15 - 3 4n = 12 4n/4 = 12/4 n = 3
3n + 4n = 42 7n = 42 n = 42/7 n = 6
3n + 4n = -14 7n /7 = -14 /7 n = -2