Question

tìm y:

a) (y + 5) x 2020 = (200 + 5) x 2020

b) y - 45600 = (2019 - 419) x 4 x 25

Answer 1

a) (y + 5) x 2020 = 205 x 2020

(y + 5) x 2020 = 414100

y + 5 = 414100 : 2020 = 205

y = 205 - 5 = 200

Answer 2

a) y= 200

b) y-45600 = 1600 × 4 ×25

y-45600=160000

y= 114400

Answer 3

b) y - 45600 = (2019 - 419) x 4 x 25

y - 45600 = 1600 x 100

y - 45600 = 160000

y = 160000 + 45600 = 205 600