2 * X -9 = 26
2 * x = 35
x = 35/2
x = 17.5
Yes, 26 is a deficient number. A deficient number is one for which the sum of its proper divisors is less than the number itself. The proper divisors of 26 are 1, 2, and 13, which sum to 16, less than 26. Therefore, 26 is classified as a deficient number.
Note that 26x3=78. Next note that 78 divided by 6 is 13. This tells us 78 has 26 and 6 as factors and clearly it is less than 85.
-sqrt(26)
- sqrt(26)
The number that is between 26 and 30 is 27. This number falls exactly in the middle of 26 and 30 on the number line. It is one unit greater than 26 and one unit less than 30.
13 and 26
48 - 26 = 22
23
Note that 26x3=78. Next note that 78 divided by 6 is 13. This tells us 78 has 26 and 6 as factors and clearly it is less than 85.
-sqrt(26)
- sqrt(26)
The number that is between 26 and 30 is 27. This number falls exactly in the middle of 26 and 30 on the number line. It is one unit greater than 26 and one unit less than 30.
26
78
- sqrt(26)
78
n - 6 = 20