document.write( "Question 832357: THREE YEARS AGO NAVIN AND PAMMI HAD AN AVERAGE AGE OF 18YEARS.WITH SUBHA JOINING THEM NOW THEIR AVERAGE BECAME 22YEARS.WHAT IS SUBHA'S AGE NOW?
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Algebra.Com's Answer #501997 by hovuquocan1997(83) $\"\"$ $\"About$

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Let the age of Navin be x, the age of Pammi be y, and the age of Subha be z
\n" ); document.write( "Now you have, three years ago, means you will have x-3, and y-3
\n" ); document.write( "The average is 18, so your equation will be
\n" ); document.write( " $\"%28%28x-3%29+%2B+%28y-3%29%29%2F2+=+18\"$
\n" ); document.write( " $\"%28x%2By-6%29%2F2+=+18\"$
\n" ); document.write( " $\"x%2By+-+6+=+36\"$
\n" ); document.write( " $\"x%2By+=+42\"$
\n" ); document.write( "Now you have x+y = 42
\n" ); document.write( "Now you have the average of x, y, and z are 22, so you have the equation:
\n" ); document.write( " $\"%28x%2By%2Bz%29%2F3+=+22\"$
\n" ); document.write( " $\"x%2By%2Bz+=+66\"$
\n" ); document.write( "But you have x+y = 42, so let's plug it in
\n" ); document.write( " $\"x%2By%2Bz+=+66\"$
\n" ); document.write( " $\"42+%2B+z+=+66\"$
\n" ); document.write( " $\"z+=+24\"$
\n" ); document.write( "TA-DAH
\n" ); document.write( ":D \n" ); document.write( "

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