document.write( "Question 872154: Bob is 31 years younger then his father. The sum of their ages is 57. What is bobs age? \n" ); document.write( "
Algebra.Com's Answer #525991 by ewatrrr(24785)\"\" \"About 
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x + (x+31) = 57
\n" ); document.write( " 2x = 26
\n" ); document.write( " x = 13, Bob's age
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