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Rates and investments-systems of equations problem

Question:

Rates and Investments : Systems of Equations Problem

A family made an investment for 1 year that earned $7.50 simple interest. If the principal had been $25 more and the interest rate 1% less, the interest would have been the same. Find the principal and the rate.

750/r = Pr/r, 7.50(P = 25)(p - .01), 7.50/775/r)(r - .01)

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Algebra: Rates and investments-systems of equations problem

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