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The product of two rational numbers is -2. If one of them is 4/7, find the other.

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The product of two rational numbers is -2. If one of them is 4/7, find the other.
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The product of two numbers is = -2

And, one of them is 4/7

The othert number = -2/(4/7)

= -2 x 7/4

= (-1 x 7)/1 x 2

= -7/2

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