A cash register contains $20 bills and $50 bills with a total value of $1240. If there are 32 bills total, then how many of each does the register contain?
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Answer:
There are 12 $20 bills and there are 20 $50 bills
Step-by-step explanation:
take number of $20 bills as X and $50 bills as Y
20x+50y=1240 ------> 1st eq
x+y=32------> 2nd eq
multiply 2nd eq by 20
20x+20y=640
when you subtract the equations you get
20x-20x+50y-20y=1240-640
30y=600
y=20
substitute y=20 in 2nd equation
x+20=32
x=12
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