SOLUTION: John's bank contains only nickels, dime and quarters. There are 30 coins in all and their value is $4.30. Twice the number of dimes added to the number of quarters is five times th
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Question 821985: John's bank contains only nickels, dime and quarters. There are 30 coins in all and their value is $4.30. Twice the number of dimes added to the number of quarters is five times the number of nickels. How many coins of each kind are there in John's bank?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
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x + y + z = 30
5x + 10y + 25z = 430
2y + z = 5x
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put the system of linear equations into standard form
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x + y + z = 30
5x + 10y + 25z = 430
5x - 2y - z = 0
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copy and paste the above standard form linear equations in to this solver:
https://sooeet.com/math/system-of-linear-equations-solver.php
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answer:
x= nickels = 7
y= dimes = 12
z= quarters = 11
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