Respuesta:
[tex] \frac{x}{3} + \frac{2}{9} x = 15 \\ \frac{9(x) + 3(2x)}{27} = 15 \\ \frac{9x + 6x}{27} = 15 \\ \frac{15x}{27} = 15 \\ x = \frac{15(27)}{15} \\ x = 27[/tex]
[tex]comprobación \\ \frac{x}{3} + \frac{2}{3} x = 15 \\ \frac{27}{3} + \frac{2}{9} (27) = 15 \\ 9 + 6 = 15 \\ 15 = 15[/tex]
