document.write( "Question 1033210: Ben is 3 times as old as jin now. In 2 year time Ben will be twice as old as jin. How old is jin now. \n" ); document.write( "

Algebra.Com's Answer #647778 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+b+\"$ = Ben's age now
\n" ); document.write( "Let $\"+j+\"$ = Jin's age now
\n" ); document.write( "--------------------------
\n" ); document.write( "(1) $\"+b+=+3j+\"$
\n" ); document.write( "(2) $\"+b+%2B+2+=+2%2A%28+j+%2B+2+%29+\"$
\n" ); document.write( "-----------------------
\n" ); document.write( "Substitute (1) into (2)
\n" ); document.write( "(2) $\"+3j+%2B+2+=+2%2A%28+j+%2B+2+%29+\"$
\n" ); document.write( "(2) $\"+3j+%2B+2+=+2j+%2B+4+\"$
\n" ); document.write( "(2) $\"+j+=+2+\"$
\n" ); document.write( "Jin is 2 now
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "(1) $\"+b+=+3%2A2+\"$
\n" ); document.write( "(1) $\"+b+=+6+\"$
\n" ); document.write( "and
\n" ); document.write( "(2) $\"+b+%2B+2+=+2%2A%28+j+%2B+2+%29+\"$
\n" ); document.write( "(2) $\"+6+%2B+2+=+2%2A%28+2+%2B+2+%29+\"$
\n" ); document.write( "(2) $\"+8+=+2%2A4+\"$
\n" ); document.write( "(2) $\"+8+=+8+\"$
\n" ); document.write( "OK \n" ); document.write( "

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