$40 – 22 + x = 11-13 $25 – 4 – 2 x = 13$ $13 +7 – 5x = 21 +18$

Question

$40 – 22 + x = 11-13
$25 – 4 – 2 x = 13$
$13 +7 – 5x = 21 +18$

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Abigail 3 tuần 2021-11-21T00:11:46+00:00 2 Answers 3 views 0

Answers ( )

    0
    2021-11-21T00:13:28+00:00

    40 – 22 + x = 11 – 13

    18 + x         = -2

            x          = -2 – 18 

            x          = -20

       Vậy x = -20 

    25 – 4 – 2x = 13

    21 – 2x       = 13

            2x       = 21 – 13

            2x       = 8

              x       = 8 : 2

              x       = 4

        Vậy x = 4

    13 + 7 – 5x = 21 + 18

    20 – 5x        = 39

           5x         = 20 – 39

           5x         = -19

             x         = `-19/5`

         Vậy x = `-19/5` 

    0
    2021-11-21T00:13:31+00:00

    `40 – 22 + x = 11 – 13`

    `⇒18 + x= -2`

    `⇒ x= -2 – 18 `

    `⇒x= -20`

    `25 – 4 – 2x = 13`

    `⇒21 – 2x= 13`

    `⇒2x= 21 – 13`

    `⇒2x= 8`

    `⇒x= 4`

    `13 + 7 – 5x = 21 + 18`

    `⇒20 – 5x= 39`

    `⇒5x= 20 – 39`

    `⇒5x= -19`

    `⇒x=-19/5`

     

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