document.write( "Question 1012731: 4 members of a family 10 years ago, the average age was 24 years old | 2 Children born after the family still has the same average age | Assuming that the child is under the age of 2 years, the difference | The current age of the children, find? \n" ); document.write( "
Algebra.Com's Answer #628876 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! 4 members of a family 10 years ago, the average age was 24 years old \n" ); document.write( "| 2 Children born after the family still has the same average age \n" ); document.write( "| Assuming that the child is under the age of 2 years, the difference \n" ); document.write( "| The current age of the children, find? \n" ); document.write( ": \n" ); document.write( "The present ages of the four original members of the family, a,b,c,d \n" ); document.write( "The two children born later; e & f \n" ); document.write( "Let f < 2 yrs, as it says \n" ); document.write( "therefore \n" ); document.write( "f = 1 yr old \n" ); document.write( ": \n" ); document.write( "Av 10 yrs ago \n" ); document.write( " \n" ); document.write( "multiply both sides by 4, simplify \n" ); document.write( "a + b + c + d - 40 = 96 \n" ); document.write( "a + b + c + d = 96 + 40 \n" ); document.write( "a + b + c + d = 136, their total age now \n" ); document.write( ": \n" ); document.write( "Therefore we can write the equation including the two late born children \n" ); document.write( " \n" ); document.write( "multiply both sides by 6 \n" ); document.write( "136 + e + f = 144 \n" ); document.write( "e + f = 144 - 136 \n" ); document.write( "e + f = 8 yrs \n" ); document.write( "we know that f is 1 yr old \n" ); document.write( "e + 1 = 8 \n" ); document.write( "e = 7 yrs old \n" ); document.write( ": \n" ); document.write( "the difference: 6 yrs in the last two children \n" ); document.write( "| The current age of the children, ages 7 and 1\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " |