Answer:
G
Explanation:
The number of dimes is 3 more than the number of quarters, so d=3+q, therefore the answer is G.
If you wanted to look at the second equation as well (although you really don't have need to to solve this problem): Molly has $5.20 in dimes and quarters. Common sense tells us that dimes are worth $0.1 and quarters are worth $0.25. She has d dimes and q quarters, therefore 0.10d+0.25q=5.20.
