Problema Solution

Roberto invested some money at 8%, and then invested #3000 more than twice this amount at 11%. His total annual income from the two investment was 4830. how much was invested at 11%?

Answer provided by our tutors

let


x = the money invested at 8%


then he invested $3,000 more than twice this amount at 11%:


3000 + 2x at 11%


his total annual income from the two investment was 4830:


0.08x + 0.11(3000 + 2x) = 4830


by solving we find:


x = $15,000


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3000 + 2*15,000 = $33,000


Roberto invested $33,000 at 11%/