Question

(x:3-4).5=15

Answer 1

( x : 3 - 4 ) . 5 = 15

( x : 3 - 4 ) = 15 : 5

( x : 3 - 4 ) = 3

x : 3 = 3 + 4

x : 3 = 7

x = 7 x 3 

x = 21

Answer 2

\(\left(x:3-4\right).5=15\)

\(\Rightarrow x.3-4=15:5=3\)

\(\Rightarrow x.3=3+4=7\)

\(\Rightarrow x=7:3=\frac{7}{3}\)

Vậy \(x=\frac{7}{3}\)

Answer 3

Nhầm đấu chia, cho làm lại:

\(\left(x:3-4\right).5=15\)

\(\Rightarrow x:3-4=15:5=3\)

\(\Rightarrow x:3=3+4=7\)

\(\Rightarrow x=7.3=21\)

Vậy x = 21

Answer 4

(x : 3 - 4) . 5 = 15

 x : 3 - 4       =15 : 5

 x : 3 - 4       =   3

 x : 3            = 3 + 4

 x : 3            =    7

 x                 =  7 x 3

 x                 =    21   

Answer 5

(x:3-4).5=15

=>x:3-4=15:5=3

=>x:3  =3+4=7

=>x     =7.3

=>x     =21