[tex] \frac{k}{x} [/tex] = [tex] \frac{w}{v} [/tex] Multiply both sides by v [tex] \frac{kv}{x} [/tex] = w Multiply both sides by x kv = wx Divide both sides by w [tex] \frac{kv}{w} [/tex] = x Switch the sides to make it easier to read x = [tex] \frac{kv}{w} [/tex]