Janets family wants to save for a four-year college education for her. After some research they estimate that the total will cost about $78,000 how much should her family save if she is 12 years old in plans to go to college in 6 years?

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!