Question

$\frac{11}{6.5}= \frac{2x}{3x+1}$

Answer 1

$\dfrac{11}{6.5} = \dfrac{2x}{3x+1} \to~~~~ \dfrac{11}{30} = \dfrac{2x}{3x+1} \to ~~~~multiplique~~~~cruzado:\\\\\\ 11(3x+1)=30 . 2x\to~~~~ 33x+11 = 60x\to\\\\\\ 33x-60x= -11\to~~~~ -27x= -11.(-1)\to~~~~27x = 11\to\\\\\\ \large\boxed{x = \dfrac{11}{27} ~}$