document.write( "Question 890168: The sum of Andy and Mandy's age is 20. The product of their age is 96. If Andy is older then Mandy how old is andy use equations with a letter representing the unknown. \n" ); document.write( "
Algebra.Com's Answer #538775 by alexlove054@gmail.com(10)\"\" \"About 
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there's a mistake in the question the sum of their age is supposed to 20.
\n" ); document.write( "let their ages be x and y
\n" ); document.write( "x y=20.....1
\n" ); document.write( "xy=96.......2
\n" ); document.write( "make x the subject of the formula in equation 1
\n" ); document.write( "x=20-y......3
\n" ); document.write( "put in equation 2
\n" ); document.write( "(20-y)y=96
\n" ); document.write( "20y-y^2=96
\n" ); document.write( "take the left side to the right
\n" ); document.write( "y^2-20 96=0
\n" ); document.write( "factorize
\n" ); document.write( "y^2-12y-8y 96=0
\n" ); document.write( "y(y-12)-8(y-12)=0
\n" ); document.write( "y=8 and y=12
\n" ); document.write( "put y in equation 3
\n" ); document.write( "x=20-8=12
\n" ); document.write( "x=12
\n" ); document.write( "and y =8 \n" ); document.write( "
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