Question
. Rachel has 15 coins with a value of $2.85. If the coins are either dimes or quarters, how many of each coin does she have? Write and solve using a system of equations.
Answers
Chelle
d = dimes
q = quarters
Equations:
10d + 25q = 285
d + q = 15
Solve by substitution or elimination
Substitution:
10d + 25q = 285
d = 15 - q
Elimination:
10d + 25q = 285
-10(d + q) = -10(15)
q = quarters
Equations:
10d + 25q = 285
d + q = 15
Solve by substitution or elimination
Substitution:
10d + 25q = 285
d = 15 - q
Elimination:
10d + 25q = 285
-10(d + q) = -10(15)