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?
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document.write( "Here is what I did:
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document.write( "J=John
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document.write( "S=son\r
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document.write( "J=40+S
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document.write( "J+S+10=90
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document.write( "(40+S)+S+10=90
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document.write( "50+2s=90
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document.write( "-50 -50
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document.write( "2s=40
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document.write( "s=20
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document.write( "J=40+S
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document.write( "J=40+20
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document.write( "J=60\r
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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.
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document.write( "30+70=100
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document.write( "I am just now seeing a different way. Would is be J+S+20=90?
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document.write( "
Algebra.Com's Answer #433749 by Simnepi(216)![]() ![]() 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! \n" ); document.write( " |