document.write( "Question 813173: Bob is 25 years younger than his father and 27 years older than his son. What are their ages. The sum must total 100.\r
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Algebra.Com's Answer #489514 by erica65404(394)\"\" \"About 
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father = x
\n" ); document.write( "Bob = y
\n" ); document.write( "Son = z
\n" ); document.write( "x = 25 + y
\n" ); document.write( "y = y
\n" ); document.write( "z =y - 27
\n" ); document.write( "x + y + z = 100
\n" ); document.write( "\"%2825%2By%29+%2B+y+%2B+%28y-27%29+=+100\"
\n" ); document.write( "\"25+%2B+y+%2B+y+%2B+y+-+27+=100\"
\n" ); document.write( "\"3y+-+2+=+100\"
\n" ); document.write( "\"3y+=+102\"
\n" ); document.write( "\"y+=+34\"
\n" ); document.write( "Bob is 34. since his father is 25 years older, his father is 59. Since his son is 27 years younger, his son is 7.
\n" ); document.write( "34 + 59 + 7 = 100
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