SOLUTION: Solve the problem. Roberto invested some money at 7%, and then invested $2,000 more than twice this amount at 11%. His total annual income from the two investments was $3,990. How

Question 170451: Solve the problem. Roberto invested some money at 7%, and then invested $2,000 more than twice this amount at 11%. His total annual income from the two investments was $3,990. How much was invested at 11%?
Answer by jojo14344(1513) (Show Source): You can put this solution on YOUR website!
Let ---> money inv. 7%
Therefore, ---> money inv. @ 11%
It follows,

=$13,000, amount inv @ 7%
Then,
=$28,000, amount inv at 11% (ANSWER)
Check,

Thank you,
Jojo
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