document.write( "Question 1051294: Juan is 4 times older as Jan. Twelve years from now Juan will be
\n" ); document.write( "6 times as old as Jan was tree years ago. How old are they now? \n" ); document.write( "

Algebra.Com's Answer #666867 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Let $\"+a+\"$ = Juan's age now
\n" ); document.write( "Let $\"+b+\"$ = Jan's age now
\n" ); document.write( "--------------------------
\n" ); document.write( "(1) $\"+a+=+4b+\"$
\n" ); document.write( "(2) $\"+a+%2B+12+=+6%2A%28+b+-+3+%29+\"$
\n" ); document.write( "----------------------------
\n" ); document.write( "(2) $\"+a+%2B+12+=+6b+-+18+\"$
\n" ); document.write( "(2) $\"+a+=+6b+-+30+\"$
\n" ); document.write( "Plug (1) into (2)
\n" ); document.write( "(2) $\"+4b+=+6b+-+30+\"$
\n" ); document.write( "(2) $\"+2b+=+30+\"$
\n" ); document.write( "(2) $\"+b+=+15+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+=+4b+\"$
\n" ); document.write( "(1) $\"+a+=+4%2A15+\"$
\n" ); document.write( "(1) $\"+a+=+60+\"$
\n" ); document.write( "Juan is 60
\n" ); document.write( "jan is 15
\n" ); document.write( "------------------
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+a+%2B+12+=+6%2A%28+b+-+3+%29+\"$
\n" ); document.write( "(2) $\"+60+%2B+12+=+6%2A%28+15+-+3+%29+\"$
\n" ); document.write( "(2) $\"+72+=+6%2A12+\"$
\n" ); document.write( "(2) $\"+72+=+72+\"$
\n" ); document.write( "OK \n" ); document.write( "

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