SOLUTION: Janet invested $31,000, part at 10% and part at 1%. If the total interest at the end of the year is $1,390, how much did she invest at 10%? please help thanks

Question 127324: Janet invested $31,000, part at 10% and part at 1%. If the total interest at the end of the year is $1,390, how much did she invest at 10%?
please help thanks
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the part of $31,000 invested at 10%
Then will be the amount invested at 1%

$12,000 was invested at 10% answer
check:

OK
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