SOLUTION: Doris invested some money at 4% and some money at 7%. She invested $6,000 more at 7% than she did at 4%. Her total yearly investments was $750. How much did Doris invest at each ra

SOLUTION: Doris invested some money at 4% and some money at 7%. She invested $6,000 more at 7% than she did at 4%. Her total yearly investments was $750. How much did Doris invest at each ra

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Question 441030: Doris invested some money at 4% and some money at 7%. She invested $6,000 more at 7% than she did at 4%. Her total yearly investments was $750. How much did Doris invest at each rate?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
4x+7(x+6000)=75000
4x+7x+42000=75000
11x=33000
x=3000
x+6000=9000
Doris invested $3000 at 4% and $9000 at 7%..
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