Question

3+(15-x)=38

hãy tìm x 

 

Answer 1

3+(15-x)=38

      15-x=38-3

      15-x=35

           x=35-15

           x=20

Answer 2

3+(15-x)=38

⇔3+15-x=38

⇔-x=38-3-15

⇔-x=20

⇔x=-20

Vậy x= -20

Answer 3

⇔15 - x = 38 - 3

⇔ 15 - x = 35

⇔ x = 15 - 35 

⇔ x = - 20

Vậy, x = - 20