Imagine you have a bag with 6 candies (d = 6). Now, if you want to know how many candies you have if each of them magically doubled, think of it as making a copy of each candy in the bag. So, you would have 2 of each candy now!
When you double the number of candies in your bag (2d), you'll have 6 candies x 2, which equals 12 candies. It's like turning each candy in the bag into twins.
Let's break it down even more simply. If you have one apple and double it, you now have two apples. Similarly, if you have 6 apples (d = 6) and double them, you will end up with 12 apples (2d = 12).
So, when you see d = 6, it means you start with 6 of something, and when you see 2d, it's like having twice that amount. Therefore, 2d = 12 is the final answer when you double the original number.
In conclusion, multiplying by 2 simply means taking the number you have and adding it to itself. It's like creating a clone of the original number, which results in having twice as many of that item. So, in this case, d = 6 and 2d = 12, showing that doubling 6 gives you 12.