SOLUTION: holly rioux invested some money at 3.5% simple interest, and $5000 more than 3 times this amount at 4%. In one year, she earned $1440 in interest. How much did she invest at each r

Algebra ->  Linear-equations -> SOLUTION: holly rioux invested some money at 3.5% simple interest, and $5000 more than 3 times this amount at 4%. In one year, she earned $1440 in interest. How much did she invest at each r      Log On