And all day parking meter takes only dimes and quarters if it contains 100 coins with the total value of $14.50 how many of each type of coin are there in the meter

Answer 1

If x is the number of dimes, number of quarters is (100-x), and

1450 = 10x + 25*(100-x)

1450 = 10x +2500 - 25x

1450 - 2500 = 10x - 25x + 2500 - 2500

-1050 = -15x

15x = 1050

x = 70

70 dimes and (100 - 70) = 30 quarters