Respuesta :
(4x + 20) + (x - 10) = 180
4x + 20 + x - 10 = 180
5x + 20 - 10 = 180
5x + 10 = 180
5x = 170
x = 34
4x + 20 + x - 10 = 180
5x + 20 - 10 = 180
5x + 10 = 180
5x = 170
x = 34