Question

Answer 1

x .7 = 42 

\(\Rightarrow\)x=6

28 : x = 4 

\(\Rightarrow\)x=7

49:x=7

\(\Rightarrow\)x=7

x:8=15

\(\Rightarrow\)x=120

472-x=50:5

472-x=10

\(\Rightarrow\)x=462

x:4=200:5

x:4=40

\(\Rightarrow\)x=160

x:9=5.14

x:9=70

\(\Rightarrow\)x=630

 

Answer 2

Ta có: x:7=42

nên x=294

Ta có: 48:x=4

nên x=12

Ta có: \(y\cdot7=84:4\)

nên y=3

Answer 3

Ta có: x:7=42

nên x=294

Ta có: 48:x=4

nên x=12

Ta có: 

nên y=3

Answer 4

x .7 = 42 

x=6

28 : x = 4 

x=7

49:x=7

x=7

x:8=15

x=120

472-x=50:5

472-x=10

x=462

x:4=200:5

x:4=40

x=160

x:9=5.14

x:9=70

x=630

 

 

 

 

Answer 5

x .7 = 42 

x=6

28 : x = 4 

x=7

49:x=7

x=7

x:8=15

x=120

472-x=50:5

472-x=10

x=462

x:4=200:5

x:4=40

x=160

x:9=5.14

x:9=70

x=630