### How many numbers are between 773 and 1000?

Let's start with an easier problem. If you want to know how many numbers are between 1 and 7, then you have 2 & 3 & 4 & 5 & 6 which is 5 numbers. If you subtract 1 from 7, then you have 6 numbers. So, to get the final answer you subtract the two original numbers and then subtract one more. In our example, 7 - 1 = 6 and 6 - 1…

### 7 plus 3x equals 5x plus 13?

So you have the problem 7 + 3x = 5x + 13 you need to get all the x's to one side and all constants "like 7" to the other side. So from the left side, subtract 7 from that side but then subtract it from the 13 on the other side. Now you get 3x = 5x + 6 Now subtract the 5x from the right side and from the left side. Now you…

### What are three arithmetic means between -2 and 12?

Any number can be an arithmetic mean. SO just pick any three numbers between -2 and 12. And if you want to find a set of numbers for which your selected number is a mean add 1 and subtract 1 from it, or add 2 and subtract 2 from it (or do both). Suppose you pick 8. Add 1 and subtract 1: 7 and 9. 8 IS the arithmetic mean of 7 and 9. Add…