document.write( "Question 903965: Marks age now if he is seven-ninths of what it will be 18 yrs from now
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Algebra.Com's Answer #548411 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+x+\"$ = Mark's age now
\n" ); document.write( " $\"+x+=+%28+7%2F9+%29%2A%28+x+%2B+18+%29+\"$
\n" ); document.write( " $\"+9x+=+7%2A%28+x+%2B+18+%29+\"$
\n" ); document.write( " $\"+9x+=+7x+%2B+126+\"$
\n" ); document.write( " $\"+2x+=+126+\"$
\n" ); document.write( " $\"+x+=+63+\"$
\n" ); document.write( "Mark is 63 now
\n" ); document.write( "check:
\n" ); document.write( "In $\"+18+\"$ yrs, he will be:
\n" ); document.write( " $\"+63+%2B+18+=+81+\"$
\n" ); document.write( " $\"+63+=+%28+7%2F9+%29%2A%28+63+%2B+18+%29+\"$
\n" ); document.write( " $\"+63+=+%28+7%2F9+%29%2A81+\"$
\n" ); document.write( " $\"+63+=+7%2A9+\"$
\n" ); document.write( " $\"+63+=+63+\"$
\n" ); document.write( "OK \n" ); document.write( "

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