Respuesta :

fatemehkorea

Answer:

x = 10

Step-by-step explanation:

28/20 = 1.4

4x+2/3x = 1.4

4x+2/3x = 14/10

40x+20 = 42x

40x-42x = -20

-2x = -20

-x = -20/2

-x = -10

x = 10