document.write( "Question 550580: john and tom are brothers. Tom is seven years older than john. In four years tom will be twice as old as john. how old is tom? how old is john
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Algebra.Com's Answer #358879 by mananth(16946)\"\" \"About 
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john is x years
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\n" ); document.write( "\n" ); document.write( "4 years hence
\n" ); document.write( "John -------- x+4
\n" ); document.write( "Tom ---------x+7+4 =x+11\r
\n" ); document.write( "\n" ); document.write( "x+11=2(x+4)
\n" ); document.write( "x+11=2x+8
\n" ); document.write( "2x-x=11-8
\n" ); document.write( "x=3 that's john's age
\n" ); document.write( "Tom'a age = 3+7 =10 years
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