document.write( "Question 319200: please help me solve this equation: The sum of two numbers is 8.5, their product is 18. Find the numbers..thanks very much \n" ); document.write( "
Algebra.Com's Answer #228552 by stanbon(75887)\"\" \"About 
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please help me solve this equation: The sum of two numbers is 8.5, their product is 18. Find the numbers.
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\n" ); document.write( "x+y = 8.5
\n" ); document.write( "xy = 18
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\n" ); document.write( "Solve using substitution:
\n" ); document.write( "x = 8.5-y
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\n" ); document.write( "Substitute into xy = 18:
\n" ); document.write( "(8.5-y)y = 18
\n" ); document.write( "-y^2 + 8.5y = 18
\n" ); document.write( "y^2 - 8.5y + 18 = 0
\n" ); document.write( "(y-4.5)(y-4) = 0
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\n" ); document.write( "If y = 4.5, x = 4
\n" ); document.write( "If y = 4, x = 4.5
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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