n=10
2
n + 13 = 21. n = 21 - 13
n=3
The answer to the question is 9.
n + (2 x 3) = 21 Therefore, n = 21 - (2 x 3) n = 15
It is an equation and the value of n is 9
n + 15 = 36 Therefore, n = 36 - 15 n = 21
Sodium (Na)
6 + n = 17n = 17 - 6Therefore, n = 11.
38 + (n/2) = 21 Therefore, n/2 = -17 n = -17 x 2 n = -34
n = -6
n/7 = 6+5 n/7 = 11 n = 11 X 7 n = 77