document.write( "Question 964729: Simon is 6yrs older than Alex and his sister is 8yrs younger than Alex . Their combined age is 37 . How old is Simon \n" ); document.write( "
Algebra.Com's Answer #589567 by t0hierry(194)\"\" \"About 
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simon age is 6 + alex age
\n" ); document.write( "sister is alex age - 8
\n" ); document.write( "simon age + sister age is 37\r
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\n" ); document.write( "\n" ); document.write( "sm = al + 6
\n" ); document.write( "si = al - 8
\n" ); document.write( "sm + alex + si = 3 al -2 = 37
\n" ); document.write( "al = 39/3 = 13 years old
\n" ); document.write( "sm = 19 years old\r
\n" ); document.write( "\n" ); document.write( "I am assuming combined means 3 of them.
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