document.write( "Question 575077: John is 4 years older than Kate. In 7 years he will be twice as old as Kate was five years ago. What are their ages now? \n" ); document.write( "
Algebra.Com's Answer #369369 by Earlsdon(6294)\"\" \"About 
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Let J = John's present age and K = Kate's present age.
\n" ); document.write( "J = K+4 \"John is 4 years older than Kate.\"
\n" ); document.write( "J+7 = 2(K-5) Substitute J = K+4.
\n" ); document.write( "K+4+7 = 2K-10
\n" ); document.write( "K+11 = 2K-10
\n" ); document.write( "K = 21 and J = 25
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