Question 1120062
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Let x be her total investment. Then


    0.06*(0.5x) + 0.09*(0.5x) = 630   dollars,

    0.030x + 0.045x = 630

    0.075x = 630  ====>  x = {{{630/0.075}}} = 8400.


<U>Answer</U>.  Total investment was  $8400.
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