document.write( "Question 1096120: Bob is 3 years older than Robby and Amy is twice as old as Bob. The sum of their ages is 57. How old is Bob? \n" ); document.write( "

Algebra.Com's Answer #710572 by jorel1380(3719) $\"\"$ $\"About$

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Let n be Robby's age. Then Bob is n+3, and Amy is 2n+6. So:
\n" ); document.write( "n+n+3+2n+6=57
\n" ); document.write( "4n=48
\n" ); document.write( "n=12
\n" ); document.write( "n+3=15
\n" ); document.write( "Bob is 15
\n" ); document.write( "☺☺☺☺ \n" ); document.write( "

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