Question 14643
The two equations are
d=3q
0.25q+0.10d=6.60
Substitute the value of d into the second equation
0.25q+0.10(3q)=6.60
0.25q+0.3q=6.60
.55q=6.60
q=12
Plug in the value of q into one of the original equations
d=3(12)
d=36
There are 12 quarters and 36 dimes