SOLUTION: a women invest total of $20000 in two accounts, one paying 5% and other paying 8% simple interest per year. Her annual interest is $1180. How much did she invest at each year?

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Question 1073946: a women invest total of $20000 in two accounts, one paying 5% and other paying 8% simple interest per year. Her annual interest is $1180. How much did she invest at each year?
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.A%2BB=20000
2.5A%2B8B=118000
Multiply eq. 1 by 5 and subtract from eq. 2 to eliminate A.
5A%2B8B-5A-5B=118000-100000
3B=18000
Now solve for B then use either equation to solve for A.