document.write( "Question 393812: A music store is selling compact discs for $11.50 and $7.50. You buy 12 discs and spend a total of $106. How many CD's that cost $11.50 did you buy? \n" ); document.write( "

Algebra.Com's Answer #279447 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "buy 12 discs
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document.write( "Let x and (12-x)represent the number of disk costing 11.50 and 7.50 respectively
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document.write( "Question states***
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document.write( " 11.50x + 7.50(12-x) = $106
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document.write( "             4x = $106 - 7.50*12
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document.write( "             4x = $106 - 90
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document.write( "             4x = 16
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document.write( "              x = 4, the number of disk costing 11.50\r
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document.write( "CHECKING our Answer
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document.write( "  4*$11.50 + 8*$7.50 = $106
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