) (x – 3) : 2 = 514 : 512 b) 4x + 3x = 30 – 20 : 10

Question

) (x – 3) : 2 = 514 : 512
b) 4x + 3x = 30 – 20 : 10

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King 5 years 2020-11-19T17:57:27+00:00 2 Answers 79 views 0

Answers ( )

  1. Verity
    0
    2020-11-19T17:59:09+00:00
    Reply

    ĐÁP ÁN :

    a)` (x – 3) : 2 = 514 : 512`

    `(x – 3) : 2 =514/512`

    `x – 3 = 541/512  . 2`

    `x – 3 = 2,0078125`

    b) `4x + 3x = 30 – 20 : 10`

    `7x = 30 – 2`

    `7x = 28`

    `x = 28/7 `

    `x = 4 `

    #NOCOPY

  2. Calantha
    0
    2020-11-19T17:59:21+00:00
    Reply

      (x  –  3 )  :  2   =  514 : 512

      ( x – 3 ) : 2 =  $\frac{63}{64}$ 

      x – 3          = $\frac{63}{64}$ . 2

      x – 3          = $\frac{63}{32}$ 

      x                = $\frac{63}{32}$ + 3

      x                = $\frac{159}{32}$

     4x + 3x = 30 – 20 : 10

     7x = 30 – 2

     7x  = 28

       x  = 28 :7

       x  = 4

      

     

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