document.write( "Question 937665: Jen is three times as old as her son. Ten years from now, she will be twice as
\n" ); document.write( "old as her son will be then. How old is Jen’s son now?\r
\n" ); document.write( "\n" ); document.write( "I know J=s3\r
\n" ); document.write( "\n" ); document.write( "And I want to say J+10=2s+10, but that doesnt work.
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Algebra.Com's Answer #571058 by rothauserc(4718)\"\" \"About 
You can put this solution on YOUR website!
J = 3s
\n" ); document.write( "J+10 = 2(s +10)
\n" ); document.write( "substitute for J in second equation
\n" ); document.write( "3s+10 = 2s +20
\n" ); document.write( "s = 10
\n" ); document.write( "J = 30
\n" ); document.write( "s = 10, Jenn's son is 10 years old\r
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