document.write( "Question 774165: A bank teller needs to pay out $75 using $5 bills and $20 bills. Find all possibilities for the number of each type of bill the teller could use.
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Algebra.Com's Answer #472086 by josgarithmetic(39630)\"\" \"About 
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Use x for the $5 size and y for the $20 size count of each bill type.\r
\n" ); document.write( "\n" ); document.write( "\"5x%2B20y=75\" and you want only whole number possibilities.
\n" ); document.write( "Simplify...\"x%2B4y=15\"\r
\n" ); document.write( "\n" ); document.write( "The count of x should be more than the count of y, so you could just solve the equation for y, and check the whole number results for x values starting at 1. Some will work and some will fail.\r
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\n" ); document.write( "\n" ); document.write( "The easier way to do this is start with \"75%2F5=15\" of the $5 bills, and successively step-wise subtract $20 value as 4 of the $5 bills until no more can be substituted.\r
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\n" ); document.write( "\n" ); document.write( "Each
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\n" ); document.write( "Count____$5______$20
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\n" ); document.write( "_________15______0
\n" ); document.write( "_________11______1
\n" ); document.write( "_________7_______2
\n" ); document.write( "_________3_______3
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