Respuesta :

gmany

[tex]0.2m=\dfrac{4}{7}\ \ \ \ |\cdot5\\\\5\cdot0.2m=5\cdot\dfrac{4}{7}\\\\1m=\dfrac{5\cdot4}{7}\\\\m=\dfrac{20}{7}\\\\m=2\dfrac{6}{7}[/tex]