Question 365551
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.