Question

giá trị thích hợp của y để ( y - 1/5 ) : 2/3 =3/4 là .................

giá trị thích hợp của y để 7 /4 - y x 5/6 = 1/2 + 1/3 là ....................

Answer 1

1)

( y - 1/5 ) : 2/3 = 3/4

y - 1/5            = 3/4 x 2/3

y - 1/5            = 1/2

y                   = 1/2 + 1/5

y                   = 7/10.

2)

7/4 - y x 5/6 = 1/2 + 1/3

7/4 - y x 5/6 = 5/6

7/4 - y         = 5/6 : 5/6

7/4 - y         = 1

y                = 7/4 - 1

y                = 3/4

Answer 2

C1 :(y-1/5):2/3=3/4

y-1/5=3/4.2/3

y-15=1/2

y=1/2+15

y=31/2

C2:

7/4-y.5/6=1/2+1/3

7/4-y.5/6=5/6

y.5/6=7/4-5/6

y.5/6=11/12

y=11/12:5/6

y=11/10

Answer 3

Cho mk sửa lại

C1 :(y-1/5):2/3=3/4

y-1/5=3/4.2/3

y-15=1/2

y=1/5+15

y=7/10

C2:

7/4-y.5/6=1/2+1/3

7/4-y.5/6=5/6

y.5/6=7/4-5/6

y.5/6=11/12

y=11/12:5/6

y=11/10

Answer 4

TFboys_Lê Phương Thảo 

mình tnhf thấy hình như câu 1 bạn làm sai rùi

Answer 5

C1 :(y-1/5):2/3=3/4

y-1/5=3/4.2/3

y-15=1/2

y=1/2+15

y=31/2

C2:

7/4-y.5/6=1/2+1/3

7/4-y.5/6=5/6

y.5/6=7/4-5/6

y.5/6=11/12

y=11/12:5/6

y=11/10

Answer 6

C1 :(y-1/5):2/3=3/4

y-1/5=3/4.2/3

y-15=1/2

y=1/2+15

y=31/2

C2:

7/4-y.5/6=1/2+1/3

7/4-y.5/6=5/6

y.5/6=7/4-5/6

y.5/6=11/12

y=11/12:5/6

y=11/10

Answer 7

SeeU bn làm sai rồi câu b = 11/10 ý