Question

(4x-28):2=9mũhai-65

Answer 1

(4x - 28) : 2 = 9² - 65

(4x - 28) : 2 = 81 - 65

(4x - 28) : 2 = 16

4x - 28 = 16 . 2

4x - 28 = 32

4x = 32 + 28

4x = 60

x = 60 : 4

x = 15

Answer 2

(4\(x\) - 28) : 2  = 9² - 65

(4\(x\) - 28 ) : 2 = 81  - 65

(4\(x\) - 28) : 2 = 16

4\(x\) - 28 = 16 x 2

4\(x\) - 28  = 32

4\(x\)          = 32 + 28

4\(x\)          = 60

  \(x\)           = 60 : 4

  \(x\)           = 15

 

Answer 3

(4x-28):2=81-65=16
(4x-28)=16 nhân 2 =32
(4x)=32+28=60
x=60:4=15