document.write( "Question 1106616: I am now twice as old as my brother in two years my age will be four times as my brothers age five years ago how old am i today \n" ); document.write( "

Algebra.Com's Answer #721625 by josmiceli(19441) $\"\"$ $\"About$

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Let $\"+a+\"$ = my age now
\n" ); document.write( "Let $\"+b+\"$ = my brother's age now
\n" ); document.write( "-----------------------------------
\n" ); document.write( "(1) $\"+a+=+2b+\"$
\n" ); document.write( "(2) $\"+a+%2B+2+=+4%2A%28+b+-+5+%29+\"$
\n" ); document.write( "----------------------------
\n" ); document.write( "(2) $\"+a+%2B+2+=+4b+-+20+\"$
\n" ); document.write( "(2) $\"+a+=+4b+-+22+\"$
\n" ); document.write( "Plug (1) into (2)
\n" ); document.write( "(2) $\"+2b+=+4b+-+22+\"$
\n" ); document.write( "(2) $\"+2b+=+22+\"$
\n" ); document.write( "(2) $\"+b+=+11+\"$
\n" ); document.write( "and
\n" ); document.write( "(1) $\"+a+=+2b+\"$
\n" ); document.write( "(1) $\"+a+=+2%2A11+\"$
\n" ); document.write( "(1) $\"+a+=+22+\"$
\n" ); document.write( "----------------------
\n" ); document.write( "I am 22 today
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "(2) $\"+a+%2B+2+=+4%2A%28+b+-+5+%29+\"$
\n" ); document.write( "(2) $\"+22+%2B+2+=+4%2A%28+11+-+5+%29+\"$
\n" ); document.write( "(2) $\"+24+=+4%2A6+\"$
\n" ); document.write( "(2) $\"+24+=+24+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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