document.write( "Question 1044405: Help me with this question please.\r
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document.write( "At present Mary is four younger than her brother Tom.If Tom is n years old,what will be the sum of their age in three years time?If the sum of their age is 15 then,how old will Tom be? \n" );
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Algebra.Com's Answer #659680 by Alan3354(69443)![]() ![]() You can put this solution on YOUR website! At present Mary is four younger than her brother Tom. If Tom is n years old,what will be the sum of their age in three years time? \n" ); document.write( "-- \n" ); document.write( "The difference remains 4 years. \n" ); document.write( "Tom is n, Mary is n-4. \n" ); document.write( "In 3 years, Tom will be n+3, Mary will be n-1. \n" ); document.write( "(n+3) + (n-1) = 2n+2 \n" ); document.write( "================ \n" ); document.write( "If the sum of their age is 15 then,how old will Tom be? \n" ); document.write( "How old will he be when? \n" ); document.write( "-------- \n" ); document.write( "Now? \n" ); document.write( "T - M = 4 \n" ); document.write( "T + M = 15 \n" ); document.write( "------------- Add \n" ); document.write( "2T = 19 \n" ); document.write( "Tom is 9.5 \n" ); document.write( "Mary is 5.5 \n" ); document.write( " \n" ); document.write( " |