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)