document.write( "Question 1111469: Bobby is 3 years older than Chris last year the sum of their age was 39 how old each now \n" ); document.write( "
Algebra.Com's Answer #726594 by ankor@dixie-net.com(22740)\"\" \"About 
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Bobby is 3 years older than Chris
\n" ); document.write( "b = c + 3
\n" ); document.write( "or
\n" ); document.write( "b - c = 3
\n" ); document.write( " last year the sum of their age was 39 how old each now
\n" ); document.write( "(b-1) + (c-1) = 39
\n" ); document.write( "b + c - 2 + 39
\n" ); document.write( "b + c = 41
\n" ); document.write( ":
\n" ); document.write( "Use elimination
\n" ); document.write( "b - c = 3
\n" ); document.write( "b + c = 41
\n" ); document.write( "-------------addition eliminates c, find b
\n" ); document.write( "2b = 44
\n" ); document.write( "b = 22 yrs is Bob's age
\n" ); document.write( "then obviously
\n" ); document.write( "c = 19 yrs is Chris's age
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\n" ); document.write( "Check
\n" ); document.write( "\"last year the sum of their age was 39\"
\n" ); document.write( "(22-1) + (19-1) = 39
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