document.write( "Question 1151808: The total age of three sisters is 79. The youngest is 7 years younger than the middle. The age of the older is twice that of the youngest. What is the age of the middle? \n" ); document.write( "
Algebra.Com's Answer #773648 by josgarithmetic(39618)\"\" \"About 
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Several problems like this have already been solved. Try giving a variable to \"the middle\" sister, and see what you can do literally with the description. \n" ); document.write( "
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