q + d = 45
q = 45-d
10d + 25q = 7.65
Substitute 45-d for q in last equation and solve for d. Insert that value into the first equation and solve for q. Check by inserting both values into the last equation.
Bobbie has 45 coins in dimes and quarters. The total value of the coins is $7.65. How many quarters and dimes does have?
1 answer