Question

The product of two rational numbers is 10. If one of the numbers is −8, find the other.

Answer 1

$\begin{array}{l}\text{Let the other number}\mathrm{be}x.\\ x\times -8=10\\ \begin{array}{l}=>x=\text{1}0÷(-\text{8})\\ =10\times \frac{1}{-8}\\ =\sout{1}{\sout{0}}^5\times \frac{1}{-{\sout{8}}_4}\end{array}\\ \\ \therefore \mathrm{Other}\mathrm{number}=\frac{-5}{4}\end{array}$