# Solve inequality of fraction in terms of denominator variable

I have such inequality:

$$-0.1b \le \frac{y}{x} \le 0.1b$$

How to solve it in terms of x to have something like this:

$$? \le x \le ?$$

Thanks for any help.

You'd take the reciprocal of each term in the inequality, then multiply each term by $$y$$.
$$1 < 2 < 3 \;\;\; \Leftrightarrow \;\;\; 1 > \frac{1}{2} > \frac{1}{3}$$