<PRE><B>Question 983515</B>
Carla has $2.40 in nickels and dimes. Deron has $5.50 in dimes and quarters. Deron has as many dimes as Carla has nickels and as many quarters as Carla has dimes. How many of each kind of coin does Carla have?




Carla has $2.40 in nickels and dimes.

Let Carla have x nickels and y dimes
5x+10y=240..............(1)

Deron has x dimes 
Deron has y quarters
10x+25y=550...........(2)

Multiply (1) by 2 and subtract (2)

10x+20y=480
10x+25y=550

-5y= -70
y=14

plug  y to get x




 Deron has $5.50 in dimes and quarters. Deron has as many dimes as Carla has nickels and as many quarters as Carla has dimes. How many of each kind of coin does Carla have?

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