Imagine working with a younger sibling or student who is having trouble with the 9 times table. create an algorithm to the student learn how to do this easily. you may need to use outside resources to you. if you do, make sure to document where you retrieved those sources.

If you have a number multiplied by 9, take the number, put a zero behind it, and subtract the number from it.

For example, 9x3 --> 3 put zero to get 30, then subtract 3 to get 27

What you're basically telling the kid is to multiply by 10 and subtract the number after that. But if they were told they were "multiplying by 10" they'd get confused easier, hence putting a zero behind it will help them to multiply by 9.

For us, we're saying:

9*2 = (2*10)-2
Or
9x = (10x)-x

1. isolate the variable, in this case, d. subtract 35.5 on both sides of the equation.2. 52 subtracted by 35.5 is 16.53. therefore your answer would be d= 16.5this is the basics of pre algebra, isolating variable through adding, subtracting, multiplying, and dividing, if you have any other questions to ask just comment!