Question 1006684
d = number of dimes
q = number of quarters


10d + 25q = 440
q = d + 5


Substitute the second equation into the first.


10d + 25q = 440
10d + 25(d + 5) = 440
10d + 25d + 125 = 440
35d = 315
d = 9


Marissa has 9 dimes and 14 quarters.