Mrs. alvarado gets a raise that increases their income to $6,500 a month. their mortgage stays the same. what percent of their monthly income do they now spend on the mortgage?

Less than what they used to, if you would let me know what the mortgage is per month, I could calculate it. 

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!