X:6=18(dư3) ; 47:x=5(dư2)

2 câu trả lời

a) `x:6=18`(dư 3)

`⇒ x=18×6+3`

`⇒ x=111`

b) `47:x=5`(dư 2)

`⇒ x×5+2=47`

`⇒ x×5=45`

`⇒ x=9`

 

X:6=18(dư3)

(x-3):6=18

x-3=18*6

x-3=108

x=108-3

x=105

47:x=5(dư2)

(47-2):x=5

45:x=5

x=45:5

x=9