a) 2/3 x = -4/27 b) -8/5 x = 16/15 c) 1/3 + 1/2 : x = -4 d) 3/4 + 1/4 : x = 2/5

0 bình luận về “a) 2/3 x = -4/27 b) -8/5 x = 16/15 c) 1/3 + 1/2 : x = -4 d) 3/4 + 1/4 : x = 2/5”

1. a) `2/3 x = -4/27`

   `<=> x = -4/27 : 2/3`

   `<=> x = -2/9`

   b) `-8/5 x = 16/15`

   `<=> x = 16/15 : (-8/5)`

   `<=> x = -2/3`

   c) `1/3 + 1/2 😡 = -4`

   `<=> 1/2 : x = -4 – 1/3`

   `<=> 1/2 : x = -13/3`

   `<=> x = 1/2 : (-13/3)`

   `<=> x = -3/26`

   d) `3/4 + 1/4 : x= 2/5`

   `<=> 1/4 : x= 2/5 – 3/4`

   `<=> 1/4 : x = -7/20`

   `<=> x= 1/4 : (-7/20)`

   `<=> x= -5/7`

   Trả lời

2. a)2/3 x =-4/27

              x=-4/27:2/3

              x=-2/9

   b)-8/5 x =16/15

                x=16/15:(-8/5)

                x=-2/3

   c)1/3+1/2:x =-4

                    1/2:x=-4-1/3

                     1/2:x=-13/3

                           x=1/2:(-13/3)

                           x=-3/26

   d)3/4 + 1/4:x = 2/5

                  1/4:x=2/5-3/4

                  1/4:x=-7/20

                        x=1/4:(-7/20)

                        x=-5/7

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   Trả lời