document.write( "Question 1131352: The ratio of the ages of 3 children is 1:3:5. The oldest child is 12 years older than the youngest child. How old is the middle child? \n" ); document.write( "
Algebra.Com's Answer #748005 by Boreal(15235)\"\" \"About 
You can put this solution on YOUR website!
ages are x, 3x, 5x
\n" ); document.write( "5x=x+12
\n" ); document.write( "4x=12
\n" ); document.write( "x=3
\n" ); document.write( "ages are 3,9,15
\n" ); document.write( "the middle child is 9
\n" ); document.write( "
\n" );