Question

1 ​Tìm y

{ y x y } x 8 = 805 - 15 :3

Answer 1

( y xy) x 8 = 805 - 15 : 3

( y xy) x 8 = 800

(y xy) x 8 = 800 : 8

( y xy) x 8 = 100

nhung chi co 50 x 2 = 100.

vay y = 50.

Answer 2

y=50 nha ban

duyet nha

Answer 3

y = 10 nha bạn

Answer 4

( y x y ) x 8 = 805 - 15 : 3

( y x y ) x 8 = 805 - 5

( y x y ) x 8 = 800

y x y = 800 : 8

y x y = 100 -> y = 10

       Đ/s : 10

Answer 5

<=>y²*8=805-5

=>y²*8=800

=>y²=800:8

=>y²=100

=>y=\(\sqrt{100}\)

=>y=10 (cái này dùng máy tính bấm là ra )
 

Answer 6

<=>y²*8=805-5

=>y²*8=800

=>y²=800:8

=>y²=100

=>y=

Answer 7

( y x y ) x 8 = 805 - 15 : 3

( y x y ) x 8 = 805 -5

( y x y ) x 8 = 800

y x y           = 800 : 8

y x y          = 100

=>10 x 10 = 100

Vậy y = 10