SOLUTION: Allie invested a certain amount of money at 5% interest, and $1500 more than that amount at 6%. Her total yearly interst income was %420. How much did she invest at each rate?

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Question 161577: Allie invested a certain amount of money at 5% interest, and $1500 more than that amount at 6%. Her total yearly interst income was %420. How much did she invest at each rate?
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
Let C the first aount of money
anc D=C+1500 the second amount
then
C%280.05%29%2BD%280.06%29=420
then
C%280.05%29%2B%28C%2B1500%29%280.06%29=420
then
C%280.11%29%2B90=420
then
C%280.11%29=330
then
C=330%2F0.11=3000
Answer: Allie invested 3000 at 5% and 4500 at 6%