Question

[thu hoai]

giải giúp mik vs mik đang cần gấp ạ 

Answer 1

[Kiều Vũ Linh]

1. a) 6² : 4 . 3 + 2 . 5²

= 36 : 4 . 3 + 2 . 25

= 9 . 3 + 50

= 27 + 50

= 77

b) 5 . 4² - 32 : 4²

= 5 . 16 - 32 : 16

= 80 - 2

= 78

c) 80 - (4 . 5² - 3 .2³)

= 80 - (4 . 25 - 3 . 8)

= 80 - (100 - 24)

= 80 - 76

= 4

d) 2448 : [119 - (23 - 6)]

= 2448 : (119 - 17)

= 2448 : 102

= 24

e) 23 . 85 + 15 . 23 + 170

= 23 . (85 + 15) + 170

= 23 . 100 + 170

= 2300 + 170

= 2470

f) 3³ . 2  - 5 . 2023⁰ + 36 : 3²

= 27 . 2 - 5 . 1 + 36 : 9

= 54 - 5 + 4

= 53

Answer 2

[Kiều Vũ Linh]

2. a) 123 - 5.(x + 4) = 38

5.(x + 4) = 123 - 38

5.(x + 4) = 85

x + 4 = 85 : 5

x + 4 = 17

x = 17 - 4

x = 13

b) (3.x - 2⁴) . 7³ = 2 . 7⁴

3x - 16 = 2 . 7⁴ : 7³

3x - 16 = 2 . 7

3x = 14 + 16

3x = 30

x = 30 : 3

x = 10

c) (2600 + 6400) - 3.x = 1200

9000 - 3x = 1200

3x = 9000 - 1200

3x = 7800

x = 7800 : 3

x = 2600

d) [(6.x - 72) : 2 - 84] . 28 = 5628

(6x - 72) : 2 - 84 = 5628 : 28

(6x - 72) : 2 - 84 = 201

(6x - 72) : 2 = 201 + 84

(6x - 72) : 2 = 285

6x - 72 = 285 . 2

6x - 72 = 570

6x = 570 + 72

6x = 642

x = 642 : 6

x = 107

e) 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 = 8

f) 10 + 2.x = 4⁷ : 4⁵

10 + 2x = 4²

10 + 2x = 16

2x = 16 - 10

2x = 6

x = 6 : 2

x = 3

g) 2.x - 138 = 2³.2²

2x - 138 = 2⁵

2x - 138 = 32

2x = 32 + 138

2x = 170

x = 170 : 2

x = 85

h) 231 - (x - 6) = 1339 : 13

231 - (x - 6) = 103

x - 6 = 231 - 103

x - 6 = 128

x = 128 + 6

x = 134