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By what number should 5 be multiplied so that the product may be equal to (−7)?
Expressing in fraction form, we get:
5 = 1/5 (using the property a = 1/a)
(−7) = −1/7 (using the property a = 1/a).
We have to find a number x such that
Multiplying both sides by 5, we get:
Hence, 5should be multiplied by −5/7 to obtain (−7).