document.write( "Question 379067: jim is 3 years older than his sister kim theirs ages add up to 13
\n" ); document.write( " how old is jim and how old is kim
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Algebra.Com's Answer #269207 by stanbon(75887)\"\" \"About 
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jim is 3 years older than his sister kim; their ages add up to 13
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\n" ); document.write( "Equations:
\n" ); document.write( "j + k = 13
\n" ); document.write( "j = k +3
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\n" ); document.write( "Substitute for \"j\" and solve for \"k\":
\n" ); document.write( "k+3 + k = 13
\n" ); document.write( "2k = 10
\n" ); document.write( "k = 5 yrs old (Kim's age now)
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\n" ); document.write( "Since j = k+3, Jim's age = 8 yrs
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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