document.write( "Question 798531: sarah is 15 yrs older than joseph. in ten years from now. sarah will be twice as old as joseph .how old is sarah now? \n" ); document.write( "
Algebra.Com's Answer #482259 by Finavon(81)\"\" \"About 
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Sarah S; Joseph J
\n" ); document.write( "Now S=J+15
\n" ); document.write( "Later (S+10)=2(J+10)
\n" ); document.write( "Substitute for S
\n" ); document.write( "J+15+10=2J + 20
\n" ); document.write( "Rearrange
\n" ); document.write( "5=J
\n" ); document.write( "So S=20
\n" ); document.write( "Sarah is 20 yrs
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