Respuesta :

2/3 x [ 15 x 5 + ( -24 )] + ( -18 ) =  2/3 * [ 15 * 5 - 24 ] - 18 = 

= 2/3 * [ 45 - 24 ] - 18 = 2/3 * 21 - 18 = 2/3 * 21/1 - 18 = 2/1 * 7/1 - 18 =

= 14 - 18 = -4