SOLUTION: Donna invested her 33000 bonus, and received a total of 970 in interest after one year. If part of the money returned 4% and the remainding 2.25%. then how much did she invest at e

Question 198412: Donna invested her 33000 bonus, and received a total of 970 in interest after one year. If part of the money returned 4% and the remainding 2.25%. then how much did she invest at each rate?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = amount invested @ 4%
Let = amount invested @ 2.25%

Multiply both sides by
(1)

Multiply both sides by
(2)
Subtract (2) from (1)
(1)
(2)

And, since

She invested $13,000 @ 4% and $20,000 @ 2.25%
check:

OK
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