document.write( "Question 1086312: Sana is senior to Mona by 18 years. After 6 years Sana will be twice as old as Mona. Find Mona's present age.
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Algebra.Com's Answer #700486 by Fombitz(32388) $\"\"$ $\"About$

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$\"S=M%2B18\"$
\n" ); document.write( "In 6 years,
\n" ); document.write( " $\"S%2B6=2%28M%2B6%29\"$
\n" ); document.write( " $\"S%2B6=2M%2B12\"$
\n" ); document.write( " $\"S-2M=6\"$
\n" ); document.write( "Substituting,
\n" ); document.write( " $\"M%2B18-2M=6\"$
\n" ); document.write( " $\"-M=-12\"$
\n" ); document.write( "Solve for M, then use either equation to solve for S.
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