document.write( "Question 1081209: Lisa sold b candy bars for d dollars. Jack bought them for $0.20 less per candy bar. How many candy bars could Jack buy for $20? \n" ); document.write( "

Algebra.Com's Answer #695250 by josmiceli(19441) $\"\"$ $\"About$

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Lisa sold b candy bars for d dollars.
\n" ); document.write( "You want to find [ dollars ] / [ candy bar ]
\n" ); document.write( "which is $\"+d%2Fb+\"$ , the price of 1 candy bar.
\n" ); document.write( "----------------------------------------
\n" ); document.write( "Jack bought $\"+b+\"$ candy bars for:
\n" ); document.write( " $\"+d%2Fb+-+.2+\"$ dollars each
\n" ); document.write( "---------------------------------
\n" ); document.write( "In words:
\n" ); document.write( "[ Jack's $20 ] / [ Jack's price per candy bar ] = [ number that he can buy ]
\n" ); document.write( " $\"+20+%2F+%28+d%2Fb+-+.2+%29+\"$
\n" ); document.write( "I can multiply top and bottom by $\"+b+\"$
\n" ); document.write( " $\"+20b+%2F+%28+d+-+.2b+%29+\"$ = number he can buy
\n" ); document.write( "----------------------------
\n" ); document.write( "check answer:
\n" ); document.write( "Suppose $\"+b+=+4+\"$ and $\"+d+=+4.8+\"$
\n" ); document.write( " $\"+d%2Fb+=+1.2+\"$
\n" ); document.write( " $\"+d%2Fb+-+.2+=+1+\"$
\n" ); document.write( "Jack's price per candy bar is $1
\n" ); document.write( "For $20, he can buy:
\n" ); document.write( " $\"+20b+%2F+%28+d+-+.2b+%29+\"$
\n" ); document.write( " $\"+%28+20%2A4+%29+%2F+%28++4.8+-+.2%2A4+%29+\"$
\n" ); document.write( " $\"+80+%2F+%28+4.8+-+.8+%29+\"$
\n" ); document.write( " $\"+80+%2F+4+=+20+\"$ bars
\n" ); document.write( "OK \n" ); document.write( "

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