SOLUTION: Lakeitha earned $12,000 more in her accounting job this year. She invested the money and split it between two separate accounts. One was a certificate of deposit that paid 7.25%

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Question 294965: Lakeitha earned $12,000 more in her accounting job this year. She invested the money and split it between two separate accounts. One was a certificate of deposit that paid 7.25% interest. The other was a money market account that paid 5.4% interest. At the end of one year, she had made $730. How much did she invest in the money market account?
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
.0725X+.054(12,000-X)=730
.0725X+648-.054X=730
.0185X=730-648
.0185X=82
X=82/.0185
X=$4,432.43 AMOUNT INVESTED @ 7.25%.
12,000-4,432.43=$7,567.57 AMOUNT INVESTED @ 5.4%.
PROOF:
.0725*4,432.43+.054*7,567.57=730
321.35+408.65=730
730=730