Jill owes her parents $100. she pays them $20 every week?

Within 5 weeks she’ll have paid off the $100.

100 divided by 20 equal 5

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!