document.write( "Question 419287: Ann and Bill are both celebrating their birthday today. Two years from now Ann will be twice as old as Bill, while 3 years ago Ann was three times as old as Bill. How old is Bill now? \r
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Algebra.Com's Answer #293251 by duckness73(47)![]() ![]() You can put this solution on YOUR website! Let a = Ann's age today \n" ); document.write( "Let b = Bill's age today\r \n" ); document.write( "\n" ); document.write( "We know that in two years (when Ann is a + 2 and Bill is b + 2) that Ann will be twice Bill's age, that is:\r \n" ); document.write( "\n" ); document.write( "a + 2 = 2(b + 2) \n" ); document.write( "Simplifying this equation, we have: \n" ); document.write( "a + 2 = 2 b + 4 \n" ); document.write( "a = 2b + 2\r \n" ); document.write( "\n" ); document.write( "We know that three years ago (when Ann was a - 3 and Bill was b - 3) that Ann was three times Bill's age, that is:\r \n" ); document.write( "\n" ); document.write( "a - 3 = 3(b - 3) \n" ); document.write( "Simplifying this equation, we have: \n" ); document.write( "a - 3 = 3b - 9 \n" ); document.write( "a = 3b - 6\r \n" ); document.write( "\n" ); document.write( "Putting the two equations together, we have: \n" ); document.write( "2b + 2 = 3b - 6 \n" ); document.write( "2 = b - 6 (subtracting 2b from both sides) \n" ); document.write( "8 = b (adding 6 to both sides)\r \n" ); document.write( "\n" ); document.write( "So today, Bill is 8 and Ann is 18.\r \n" ); document.write( "\n" ); document.write( "Answer: Bill is 8 today. \n" ); document.write( " |