abhinav verma plzz solve these...!!

- by what no should [-15]
^{-1}be divided sp that the quotient may be equal to {-5}^{-1} - by what no should [5/3}
^{-2}be multiplied so that the product may be {7/3}^{-1}

**(1)**

Let the required number be *x*

Then According to the question

[– 15]^{–1} ÷ *x* = [– 5]^{–1}

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