document.write( "Question 1058379: Mary is 8 years younger than Frank. Frank is 9 years older than Barbara-Sue. The sum of their ages is 300. What is Mary's age?
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Algebra.Com's Answer #673431 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"M=F-8\"$
\n" ); document.write( " $\"F=9%2BB\"$
\n" ); document.write( " $\"M%2BF%2BB=300\"$
\n" ); document.write( "Substituting,
\n" ); document.write( " $\"F-8%2BF%2B%28F-9%29=300\"$
\n" ); document.write( " $\"3F=317\"$
\n" ); document.write( " $\"F=317%2F3\"$
\n" ); document.write( "Check your problem setup.
\n" ); document.write( "All solutions should be integers and the first one is a fraction.
\n" ); document.write( "Correct and repost. \n" ); document.write( "

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