Question

10 + 2 . x = 4^{5 :} 4³ 

720 : [ 41 - ( 2.x - 5 )]  ⁼ 2³ . 5

Mong mọi người giúp 

Answer 1

10 + 2 . x = 4⁵ : 4³ 

10+2x=4²

2x=16-10

2x=6

x=6:2

x=3

 

720 : [ 41 - ( 2.x - 5 )]  =2³ . 5

720 : [ 41 - ( 2.x - 5 )]  =40

 41 - ( 2.x - 5 ) = 720:40

 41 - ( 2.x - 5 ) = 18

2.x - 5=23

2x=23+5

2x=28

x=28:2

x=14

Answer 2

10 + 2 . x = 4^{5 :} 4³ 

10 + 2 . x = 4^5-3 

10 + 2 . x = 4²

10 + 2 . x = 16

2 . x = 16-10

2 . x = 6

x=6:2

x=3

720 : [ 41 - ( 2.x - 5 )]  ⁼ 2³ . 5

720 : [ 41 - ( 2.x - 5 )]  =8 . 5

720 : [ 41 - ( 2.x - 5 )] =40

41 - ( 2.x - 5 )=720 : 40

41 - ( 2.x - 5 )=18

2.x - 5=41-18

2.x - 5=23

2.x=23+5

2.x=28

x=28:2

x=14

Answer 3

10 + 2 . x = 4^{5 :} 4³ 

10 + 2 . x = 4^5-3 

10 + 2 . x = 4²

10 + 2 . x = 16

2 . x = 16-10

2 . x = 6

x=6:2

x=3

720 : [ 41 - ( 2.x - 5 )]  ⁼ 2³ . 5

720 : [ 41 - ( 2.x - 5 )]  =8 . 5

720 : [ 41 - ( 2.x - 5 )] =40

41 - ( 2.x - 5 )=720 : 40

41 - ( 2.x - 5 )=18

2.x - 5=41-18

2.x - 5=23

2.x=23+5

2.x=28

x=28:2

x=14

Answer 4

10 + 2 . x = 4^{5 :} 4³ 

10 + 2 . x = 4^5-3 

10 + 2 . x = 4²

10 + 2 . x = 16

2 . x = 16-10

2 . x = 6

x=6:2

x=3

720 : [ 41 - ( 2.x - 5 )]  ⁼ 2³ . 5

720 : [ 41 - ( 2.x - 5 )]  =8 . 5

720 : [ 41 - ( 2.x - 5 )] =40

41 - ( 2.x - 5 )=720 : 40

41 - ( 2.x - 5 )=18

2.x - 5=41-18

2.x - 5=23

2.x=23+5

2.x=28

x=28:2

x=14