document.write( "Question 749797: John is 5 years older than bob. Three years ago he was twice as bob. How old is john? \n" ); document.write( "
Algebra.Com's Answer #456215 by ankor@dixie-net.com(22740)\"\" \"About 
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John is 5 years older than bob.
\n" ); document.write( "j = b+5
\n" ); document.write( ":
\n" ); document.write( " Three years ago he was twice as bob.
\n" ); document.write( "j-3 = 2(b-3)
\n" ); document.write( "j - 3 = 2b - 6
\n" ); document.write( "j = 2b - 6 + 3
\n" ); document.write( "j = 2b - 3
\n" ); document.write( "replace j with (b+5)
\n" ); document.write( "b + 5 = 2b - 3
\n" ); document.write( "5 + 3 = 2b - b
\n" ); document.write( "b = 8 yr is Bob's age
\n" ); document.write( ":
\n" ); document.write( "How old is john?
\n" ); document.write( "j = 8 +5
\n" ); document.write( "j = 13
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check solutions in the statement:
\n" ); document.write( "\"Three years ago he was twice as bob.\"
\n" ); document.write( "13 - 3 = 2(8-3); confirms our answer \n" ); document.write( "
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