Question

# 13 and # 14

Step 1

(13)

Let Felix invests $ *x* amount at 7% annual interest and then according to question, the amount that he will invest at 6% interest will be $ (*x*+3000).

Now, amount of interest at 7% is given by:

Step 2

And, the amount of interest at 6% is given by:

Step 3

Since, the total interest ear...

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