Homework Help: math algebra

Posted by kevin on Wednesday, November 7, 2012 at 12:53am.

Mrs. martinez has $10,000 to invest.One bank offers her a return of 7.5% on the whole sum. Another bank offers her a return of 8% on part of the sum, and 6% on the rest of the sum. How much of the $10,000 would need to be invested at 8% at the second bank, for the overall to be the same as at the first bank?

math algebra - Steve, Wednesday, November 7, 2012 at 2:16am
we want to know when

.075*10000 = .08x + .06(10000-x)
x = 7500

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