document.write( "Question 703834: John is 40 years older than his son. Ten years later, their combined ages will be 90 years. How old is John?
\n" ); document.write( "Here is what I did:
\n" ); document.write( "J=John
\n" ); document.write( "S=son\r
\n" ); document.write( "\n" ); document.write( "J=40+S
\n" ); document.write( "J+S+10=90
\n" ); document.write( "(40+S)+S+10=90
\n" ); document.write( "50+2s=90
\n" ); document.write( "-50 -50
\n" ); document.write( "2s=40
\n" ); document.write( "s=20
\n" ); document.write( "J=40+S
\n" ); document.write( "J=40+20
\n" ); document.write( "J=60\r
\n" ); document.write( "\n" ); document.write( "This does not make sense though because if the son is 20 and John is 60 and 10 years later they are combined together to be 90 years old.
\n" ); document.write( "30+70=100
\n" ); document.write( "I am just now seeing a different way. Would is be J+S+20=90?
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Algebra.Com's Answer #433749 by Simnepi(216)\"\" \"About 
You can put this solution on YOUR website!
Yes it would!
\n" ); document.write( "Because in 10 years that will be added to both their ages! so now continue...
\n" ); document.write( "40+s)+s+20=90
\n" ); document.write( "60+2s=90
\n" ); document.write( "so
\n" ); document.write( "2s=30
\n" ); document.write( "s=15 and so j=55
\n" ); document.write( "well done for sorting it out yourself, sorry for the delay in replying it's only 0720 here in UK and I've only just got out of bed!
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