Question

A hula hoop costs $35. If Erica wants to get one, and has saved $15, how much more money does she need to save in order to buy the hula hoop?

Which of the following equations correctly represents this situation?


35 + d = 15


d − 15 = 35


15 − 35 = d


15 + d = 35

Answer 1

So we kow that Erica has saved 15 dollars and the total she needs to save is 35 dollars, we can use D to describe the difference. So the final equation would be correct.
This is because the final equation put into words is:
I have 15 dollars after adding a certain amount (D) I will end up with 35 dollars total how much is D