Question

y x 80 - 20 = 20 x 13

Answer 1

y x 80 - 20 =260

y x 80 = 260+20

y x 80 =280

y =280 :80

y =3.5

k mik né bn,

Answer 2

y x 80-20=260

y x 80=260+20

y x 80=280

y=280:80

y=(tự tính nha :D )