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
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