document.write( "Question 1045997: When Tom was born his dad was 27 8 years ago toms dad was twice the age tom will be in 5years time how old is tom now? please help I have no idea \n" ); document.write( "
Algebra.Com's Answer #661512 by josmiceli(19441)\"\" \"About 
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Let \"+a+\" = Tom's age now
\n" ); document.write( "Let \"+b+\" = Dad's age now
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\n" ); document.write( "The difference in their ages will always
\n" ); document.write( "be \"+b+-+a+\"
\n" ); document.write( "So, \"+b+-+a+\" is his dad's age when
\n" ); document.write( "Tom was born
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\n" ); document.write( "You are given that
\n" ); document.write( "(1) \"+b+-+a+=+27+\"
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\n" ); document.write( "(2) \"+b+-+8+=+2%2A%28+a+%2B+5+%29+\"
\n" ); document.write( "--------------------------
\n" ); document.write( "(1) \"+-a+%2B+b+=+27+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+b+-+8+=+2a+%2B+10+\"
\n" ); document.write( "(2) \"+-2a+%2B+b+=+18+\"
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\n" ); document.write( "Subtract (2) from (1)
\n" ); document.write( "(1) \"+-a+%2B+b+=+27+\"
\n" ); document.write( "(2) \"+2a+-+b+=+-18+\"
\n" ); document.write( "---------------------
\n" ); document.write( "\"+a+=+9+\"
\n" ); document.write( "and
\n" ); document.write( "(1) \"+b+-+9+=+27+\"
\n" ); document.write( "(1) \"+b+=+36+\"
\n" ); document.write( "-------------------
\n" ); document.write( "Tom is 9 now
\n" ); document.write( "----------------
\n" ); document.write( "check:
\n" ); document.write( "(1) \"+b+-+a+=+27+\"
\n" ); document.write( "(1) \"+36+-+9+=+27+\"
\n" ); document.write( "(1) \"+27+=+27+\"
\n" ); document.write( "and
\n" ); document.write( "(2) \"+b+-+8+=+2%2A%28+a+%2B+5+%29+\"
\n" ); document.write( "(2) \"+36+-+8+=+2%2A%28+9+%2B+5+%29+\"
\n" ); document.write( "(2) \"+28+=+2%2A14+\"
\n" ); document.write( "(2) \"+28+=+28+\"
\n" ); document.write( "OK
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