\(\frac{x}{-10}=-\frac{10}{x}\Rightarrow x\cdot x=\left(-10\right)\cdot\left(-10\right)\)
\(\Rightarrow x^2=100=10^2=\left(-10\right)^2\)
\(\Rightarrow x=10\left(x>0\right)\)
\(\frac{x}{-10}=\frac{-10}{x}\)
\(\Rightarrow x^2=100\)
Mà x > 0 nên suy ra x = 10
Vậy x = 10