Respuesta :

mathstudent55

Answer:

15x + 30y - 220

Step-by-step explanation:

30(1/2 x - 2) + 40(3/4 y - 4) =

= 30(1/2 x) - 30(2) + 40(3/4 y) - 40(4)

= 15x - 60 + 30y - 160

= 15x + 30y - 220