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Q: The sum of a number and twice the number is 30 Find the number?

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x+2x=303x=30 x=10

There are two solution: -3 and +2.

39

There aren't any numbers like that. You might be thinking of 28, which has a sum of all its factors equal to twice itself, making it a perfect number. Proper factors are a different set.

the unknown number is 30 as 50 = x +2(10) so 50 = x+20 so 30 = x

2x + 7 = 30 - 7 - 7 2x = 23 x = 23/2 x = 11.5

20

It is: 15+15 = 30

If you mean... -7+x*2=23 then x = 15. Done without the aid of a calculator ! The value of 'x' (the unknown number) MUST equal 30, because 30-7=23 - SO, half the unknown number must be 15!

The numbers seem to be 61 and the dirty Gertie, blind 30.

three more than a number is -5 find the number

Thirty: 30*2+60=120

Correction: Here is the equation you will need to solve: 7N - 30 = 2N + 5 --> 5N = 35 --> N = 7

The sum of divisors of a number, excluding the number itself, is called its aliquot sum

Let x = first number The equation would look like this: x = 2(16) - 30 x = 32- 30 x = 2 Okay, since we're using x as our variable for the first number, then the first number is 2. Next we add both of the numbers together in order to find the sum. 2 + 16 = 18 So the final answer would be 18.

(In this case, the median is the average) Find the median ((29 + 31) / 2) = 30 , multiply by number of numbers (30) = 30 * 30 = 900

Let the number be x If: 2x+60 = 120 Then: x = 30

The sum of an odd number of odd numbers can't be an even number.

The sum of the positive whole-number factors of 30 is 72.

30 and 1. 30*1 is 30, 30+1 = 31.

30*31/2 = 465

Call the number I am thinking of W ( for WikiAnswers) 2W+12=30 So 2W=18 W is 9 The number is 9

30

The answer is 240.

311