Question

[Danh Thảo Quyên]

a/

70-5 . (X-3)=45

b/

10+2 . X= 4mũ 5 : 4 mũ 3

Answer 1

[tiến sagittarius]

a)

70 - 5 . ( x -3 ) = 45

5 . ( x -3 ) = 70 - 45

5 . ( x -3 ) = 25

 ( x -3 ) = 25 : 5

( x -3 ) = 5

x = 5 -3

 x = 2

Answer 2

[Uchiha Itachi]

70-5.(x-3)=45

5.(x-3)=70-45

5.(x-3)=25

x-3=25:5

x-3=5

x=3+5

x=8

10+2.x=4^5:4^3

10+2.x=4^5-3

10+2.x=4^2

10+2.x=16

2.x=16-10

2.x=6

x=6:2

x=3