Question 995477
d = number of dimes
q = number of quarters


10d + 25q = 395
q = d + 6


Substitute the second equation into the first.


10d + 25(d + 6) = 395
10d + 25d + 150 = 395
35d = 245
d = 7


Sally gave her brother 7 dimes and 13 quarters.