document.write( "Question 190724: A music store is selling compact discs for $11.50 and $7.50. You buy 12 discs and spend a total of $106.00. How many compact dics that cost 11.50 did you buy. Show all work and write an equation \n" ); document.write( "
Algebra.Com's Answer #143211 by checkley75(3666)\"\" \"About 
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11.50x+7.50(12-x)=106
\n" ); document.write( "11.50x+90-7.5x=106
\n" ); document.write( "4x=106-90
\n" ); document.write( "4x=16
\n" ); document.write( "x=16/4
\n" ); document.write( "x=4 ans. for the number of compact discs bought.
\n" ); document.write( "Proof:
\n" ); document.write( "11.50*4+7.5(12-4)=106
\n" ); document.write( "46+7.5*8=106
\n" ); document.write( "46+60=106
\n" ); document.write( "106=106
\n" ); document.write( "
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