document.write( "Question 240250: The four children in the Dempsey family have a combined age of 25 years. Jennifer’s oldest brother is six times as old as she is. Her next-to-oldest brother is 5 years older than she is, and the youngest of her brothers is twice Jennifer’s age. How old is each of the Dempsey children? \n" ); document.write( "
Algebra.Com's Answer #176085 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! The four children in the Dempsey family have a combined age of 25 years. \n" ); document.write( " Jennifer’s oldest brother is six times as old as she is. \n" ); document.write( " Her next-to-oldest brother is 5 years older than she is, and the youngest of her brothers is twice Jennifer’s age. \n" ); document.write( " How old is each of the Dempsey children? \n" ); document.write( ": \n" ); document.write( "Let the 4 children's ages be, j, a, b, c \n" ); document.write( ": \n" ); document.write( "Write an equation for each statement: \n" ); document.write( ": \n" ); document.write( "\" The four children in the Dempsey family have a combined age of 25 years.\" \n" ); document.write( "j + a + b + c = 25 \n" ); document.write( ": \n" ); document.write( "\" Jennifer’s oldest brother is six times as old as she is.\" \n" ); document.write( "a = 6j \n" ); document.write( ": \n" ); document.write( "\" Her next-to-oldest brother is 5 years older than she is,\" \n" ); document.write( "b = j + 5 \n" ); document.write( ": \n" ); document.write( "\" and the youngest of her brothers is twice Jennifer’s age.\" \n" ); document.write( "c = 2j \n" ); document.write( ": \n" ); document.write( " How old is each of the Dempsey children? \n" ); document.write( ": \n" ); document.write( "Note that each are in terms of j, so we just substitute \n" ); document.write( "j + a + b + c = 25 \n" ); document.write( "j + 6j + (j+5) + 2j = 25 \n" ); document.write( "combine like terms \n" ); document.write( "j + 6j + j + 2j + 5 = 25 \n" ); document.write( "10j = 25 - 5 \n" ); document.write( "10j = 20 \n" ); document.write( "j = \n" ); document.write( "j = 2 \n" ); document.write( ": \n" ); document.write( "Now you use the equations we have, to find the ages a, b, c. \n" ); document.write( "Check by adding them up and seeing if they equal 25 \n" ); document.write( " |