SOLUTION: please help me solve this word problem.. julio invested a sum of money at 6% interest. krista invested $200 less than julio, but her bank paid her 9% interest. after one year, w

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Question 365551: please help me solve this word problem..
julio invested a sum of money at 6% interest. krista invested $200 less than julio, but her bank paid her 9% interest. after one year, what was the difference between the amount of interest krista had earned and the amount julio had earned?
Found 2 solutions by ewatrrr, stanbon:
Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website!
Hi,
Let x represent the amount of money Julio invested.
then Krista invested (x-$200)

.09(x-200) - .06x
.03x - 18 = difference between the amount of interest krista had earned and the amount julio had earned

Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website!
julio invested a sum of money at 6% interest.
krista invested $200 less than julio, but her bank paid her 9% interest.
after one year, what was the difference between the amount of interest krista had earned and the amount julio had earned?
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Let julio's investment be "x"
Then krista's investment is "x-200"
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Equation:
0.06x - 0.09(x-200)
= 0.06x - 0.09x + 0.09*200
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= -0.03x + 18
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Cheers,
Stan H.