Question 107722
Rosaria Perez ordered 120 pieces of jewelry; a number of bracelets at $4 each and a number of necklaces at $8 each. She wrote a check for $560 to pay for the order. How many bracelets and how many necklaces di Rosaria purchase?
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Let # of $4 pieces be "x"; value is 4x dollars
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# of $8 pieces is "120-x" ; value is 8(120-x)=960-8x dollars
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EQUATION:
value + value = 560 dollars
4x + 960-8x = 560
-4x = -400
x = 100 (# of $4 pieces)
120-x = 20 (# of $8 pieces)
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Cheers,
Stan H.