When Devon cashed a $450 check at the bank, the teller gave him 18 bills, all $20 bills and $50 bills. Which system of equations can be used to find how many of each type of bill Devon received?
You have two totals: total # of bills and total amount of $. Using x as #of 20s, and y as # of 50s, you can use the system
x+y=18
20x+50y=450
The system of the equation should be x+y=18 and 20x+50y=450.
Given that,
Based on the above information, the equations are
x + y = 18
And
20x + 50y = 450
Therefore we can conclude that the system of the equation should be x+y=18 and 20x+50y=450.
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