algebra

Solve the problem. Helen Weller invested $15,000 in an account that pays 12% simple interest. How much additional money must be invested in an account that pays 15% simple interest so that the total interest is equal to the interest on the two investments at the rate of 13%?

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  1. $5500.

    Set up the equations like this
    (11,000*.12)+(x*.15)=(11,000+x).13
    1320+ .15x=1430+ .13x
    .02x=110
    x= 5500
    by Ali :)

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