document.write( "Question 315805: You have $6,800 dollars to spend and purchased 250 sets of dishes. How many $20.00 per set can you purchased and how many $45.00 per set can you purchased.
\n" ); document.write( "Let x=number of $20.00 sets
\n" ); document.write( "Let y=number of $45.00 sets \n" ); document.write( "

Algebra.Com's Answer #225938 by josmiceli(19441) $\"\"$ $\"About$

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Let x=number of $20.00 sets
\n" ); document.write( "Let y=number of $45.00 sets
\n" ); document.write( " $\"20x%2B+45y+=+6800\"$
\n" ); document.write( "There can only be whole number solutions for $\"x\"$ and $\"y\"$
\n" ); document.write( " $\"45y+=+-20x+%2B+6800\"$
\n" ); document.write( " $\"9y+=+-4x+%2B+1360\"$
\n" ); document.write( " $\"y+=+-%284%2F9%29%2Ax+%2B+1360%2F9\"$
\n" ); document.write( "The plot looks like:
\n" ); document.write( " $\"+graph%28+500%2C+500%2C+-50%2C+400%2C+-50%2C+200%2C+-%284%2F9%29%2Ax+%2B+1360%2F9+%29+\"$
\n" ); document.write( "Any x's that give a whole number result for y is a solution \n" ); document.write( "

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