2n + 19 = -7 2n = -7 - 19 2n = -26 n= -13
3n + 2n = 25 5n = 25 n = 5
You can't. 17 + 2n = 21 + 2n gives: 2n = 4 + 2n which gives 0=4 which is not possible so the sum is not solveable.
2n + 8 = -142n = -22n = -11
9 - 5n
2n plus 7 equals 19 2n equals 12 n equals 6
2n + 19 = -7 2n = -7 - 19 2n = -26 n= -13
3n + 2n = 25 5n = 25 n = 5
You can't. 17 + 2n = 21 + 2n gives: 2n = 4 + 2n which gives 0=4 which is not possible so the sum is not solveable.
2n + 8 = -142n = -22n = -11
If: -6n-2n = 16 Then: n = -2
9 - 5n
10
15m + (2n-6m) + 11m = = 15m + 11m + 2n - 6m = 26m - 6m + 2n = 20m + 2n = 2(10m + n)
42 = 2n + 7Subtract 7 from each side of the equation:35 = 2nDivide each side by 2:17.5 = n
3 + 3n = 9 + 2n + 4n n = -2
Move the 2n over the equals sign. Become 4n (as 6n-2n= 4n) and then if 4n=16 then n=4.