SOLUTION: Kevin and Randy have a jar containing 45 coins all of which are either quarters or nickels. The total value of coins in the jAr is $8.45. How many of each type of coin do they have
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Question 1020274: Kevin and Randy have a jar containing 45 coins all of which are either quarters or nickels. The total value of coins in the jAr is $8.45. How many of each type of coin do they have Answer by Cromlix(4381) (Show Source):
You can put this solution on YOUR website! Hi there,
Make quarters = x
Nickels = y
x + y = 45.......(1)
25x + 5y = 845....(2)
Multiply (1) by 5
5x + 5y = 225.....(1)
25x + 5y = 845....(2)
Subtract (1) from (2)
20x .....= 620
x = 31
Substitute x = 31 in (10
x + y = 45......(1)
31 + y = 45
y = 14
So, there are 31 quarters and 14 nickels
Hope this helps :-)
