SOLUTION: April has 137 coins in her piggy bank for a total of $10. If the only two types of coins she has are dimes and nickels, how many of each type of coin does she have? x+y=137 .05x+

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: April has 137 coins in her piggy bank for a total of $10. If the only two types of coins she has are dimes and nickels, how many of each type of coin does she have? x+y=137 .05x+      Log On


   

Question 100488: April has 137 coins in her piggy bank for a total of $10. If the only two types of coins she has are dimes and nickels, how many of each type of coin does she have?
x+y=137
.05x+ 0.1y=10
-0.1x - 0.1y = -13.7
.05x + 0.1y = 10
-.05x = -3.7
x= -74
x+y=137
-74 + y =137
y = 211
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
the x should be positive 74 (negative divided by a negative)

that makes y 137-74 or 63

$6.30+$3.70=$10