Respuesta :

[tex](2x + 10) + (4x + 20) = 180 \\ 2x + 10 + 4x + 20 = 180 \\ 6x + 30 = 180 \\ 6x = 180 - 30 \\ 6x = 150 \\ x = \frac{150}{6} = 25[/tex]