Keith borrowed money from a credit union for 5
years and was charged simple interest at an annual rate of 7
%
. The total interest that he paid was $
3150
. How much money did he borrow?
"Interest, I=\\frac{PRT}{100}"
"3150=\\frac{P\\times 7 \\times 5}{100}"
"P=\\frac{3150 \\times 100}{35}=\\$9000"
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