document.write( "Question 103199This question is from textbook Prentice Hall
\n" ); document.write( ": A cashier's drawer has some $5 bills, some $10 bills, and some $20 bills. There are 15 bills worth a total of $185. How many $5 bills, $10 bills, and $20 bills are there? \n" ); document.write( "
Algebra.Com's Answer #75054 by checkley75(3666)\"\" \"About 
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x+y+z=15 number of bills
\n" ); document.write( "5x+10y+20z=185 amount in the drawer.
\n" ); document.write( "3 unknowns & only 2 equations needs a table
\n" ); document.write( "x=====y=====z====value
\n" ); document.write( "1=====1=====13===5+10+260=275 too much!
\n" ); document.write( "1=====2=====12===5+20+240=265 too much
\n" ); document.write( "1=====5=====9====5+50+180=235 too much
\n" ); document.write( "1=====10====4====5+100+80=185 looking good for an answer.
\n" ); document.write( "proof
\n" ); document.write( "1+10+4=15 bills.
\n" ); document.write( "1*5+10*10+4*20=5+100+80=185 value.
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