Question

By what number should 5^(-1) be multiplied to get the product -7^(-1)​

Answer 1

Let the number be x.

$5 {}^{ - 1} \times x = { - 7}^{ - 1}$

$\frac{x}{5} = \frac{ - 1}{7}$

$x = \frac{ - 5}{7}$

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