SOLUTION: I really don't know how to solve this problem: Didi invested a total of $12000 in two accounts paying 7.5%(percentage) and 6% simple interest. if her total return at the end of

Algebra ->  Algebra  -> Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: I really don't know how to solve this problem: Didi invested a total of $12000 in two accounts paying 7.5%(percentage) and 6% simple interest. if her total return at the end of       Log On

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Question 97336: I really don't know how to solve this problem:
Didi invested a total of $12000 in two accounts paying 7.5%(percentage) and 6% simple interest. if her total return at the end of the first year was $840 how much did she invest in each account.
i would really apreciate if you can solve and show me how
Answer by scott8148(5893) About Me  (Show Source):
You can put this solution on YOUR website!
x(7.5%)+(12000-x)(6%)=840 ... .075x+720-.06x=840 ... .015x=120 ... x=8000

8000 @ 7.5% ... 4000 @ 6%