SOLUTION: Kathy paid $320 in cash for a CD player. If she paid in $20 and $10 notes and there were 23 notes all together, how many of each type were there?

Question 723997: Kathy paid $320 in cash for a CD player. If she paid in $20 and $10 notes and there were 23 notes all together, how many of each type were there?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Kathy paid $320 in cash for a CD player. If she paid in $20 and $10 notes and there were 23 notes all together, how many of each type were there?
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# of notes Equation: x + y = 23
Value Equation:::::20x+10y = 320
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Modify for elimination:
x + y = 23
2x+ y = 32
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Subtract and solve for "x":
x = 9 (# of $20 notes)
Solve for "y":
x + y = 23
9 + y = 23
y = 14 (# of $10 notes)
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Cheers,
Stan H.
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