a plumber needs 100 feet of pipe for a job. she plans on buying copper pipe and PVC pipe. copper pipe costs $4.50 per foot and PVC pipe costs $1.10 per foot. the plumbers budget is up to $350

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!