1) 7 – 2x = 18 – 3x 2) 3 . ( x + 5 ) – x – 11 = 24

0 bình luận về “1) 7 – 2x = 18 – 3x 2) 3 . ( x + 5 ) – x – 11 = 24”

1. `1) 7-2x=18-3x`

   `-2x+3x=18-7`

   `x=11`

   `2) 3.(x+5)-x-11=24`

   `3x+15-x-11=24`

   `2x+4=24`

   `2x=24-4`

   `2x=20`

   `x=20:2`

   `x=10`

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   Trả lời

2. 1) 7 – 2x = 18 – 3x

   3x-2x=18-7

   vậy x=11

   2) 3 . ( x + 5 ) – x – 11 = 24

    3x+15-x-11=24

   2x+4=24

   2x=24-4

   2x=20

   x=20:2

   x=10

   vậy x=10

    

   Trả lời