document.write( "Question 1082121: Joan is 5 years older than Ellen, and 3 years ago the sum of their ages was 17 years. In how many years will Joan be 21 years old? \n" ); document.write( "
Algebra.Com's Answer #696215 by ankor@dixie-net.com(22740)\"\" \"About 
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Joan is 5 years older than Ellen,
\n" ); document.write( "j = e + 5
\n" ); document.write( "j - e = 5
\n" ); document.write( " and 3 years ago the sum of their ages was 17 years.
\n" ); document.write( "(j-3) + (e-3) = 17
\n" ); document.write( "j + e - 6 = 17
\n" ); document.write( "j + e = 17 + 6
\n" ); document.write( "j + e = 23
\n" ); document.write( "use elimination on these two equations to find j
\n" ); document.write( "j - e = 5
\n" ); document.write( "j + e = 23
\n" ); document.write( "-------------Addition eliminates e, find j
\n" ); document.write( "2j = 28
\n" ); document.write( "j = 14 yrs
\n" ); document.write( " In how many years will Joan be 21 years old?
\n" ); document.write( "Obviously she will be 21 in 7 yrs
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