Kristina has $ 5.15 in quarters and nickles in her car. The number of nickles is one more than the number of quarters. How many of each type of coin does she have?

Answer 1

N=1+Q

5N + 25Q = 515

5(1+Q) + 25Q = 515

5 +5Q + 25Q = 515

30Q = 510

Q = 510/30 = 51/3 = 17 quarters

N = 18 nickels

5(18) + 25(17) = 90+425 = 515