Kiran's aunt is 17 years older than Kiran. x + 17 How old will Kiran's aunt be when his aunt is 60 years old? a. 32
b. 47
c. 43
d. 17

43

Step-by-step explanation:

As per the condition,

x+17=60

or, x=60-17

or, x=43

∴  Kiran's age is 43

     (Ans)

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step-by-step explanation:

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you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)