SOLUTION: Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3980. How much was invested

SOLUTION: Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3980. How much was invested

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Question 42767: Roberto invested some money at 7%, and then invested $2000 more than twice this amount at 10%. His total annual income from the two investments was $3980. How much was invested at 10%?
Answer by Nate(3500) (Show Source): You can put this solution on YOUR website!

at 7%
PLUG:
(2x + 2000)
(2(14000) + 2000)
(28000 + 2000)
$30,000 at 10%
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