Question

Suppose tom has 22 coins totaling $3.70. if he has only dimes and quarters, how many of each type does he have?

Answer 1

The first thing we must do for this case is to define variables:
 x: dimes
 y: quarters
 We now write the system of equations.
 We have then:
 x + y = 22
 0.10x + 0.25y = 3.70
 Solving the system of equations we have:
 x = 12
 y = 10
 Answer:
 He has:
 12 dimes
 10 quarters