`b) 1/5 – 1/2 ( x – 3 ) = 1/3` `a) 3/5 : x – 2/3 = 4/4`

2 bình luận về “`b) 1/5 – 1/2 ( x – 3 ) = 1/3` `a) 3/5 : x – 2/3 = 4/4`”

1. #Chanhh

   b) 1/5 – 1/2 ( x – 3 ) = 1/3

   => 1/2 ( x – 3 ) = 1/5 – 1/3

   => 1/2 ( x – 3 ) = 3/15 – 5/15

   => 1/2 ( x – 3 ) = -2/15

   => x – 3 = -2/15 : 1/2

   => x – 3 = -2/15 . 2

   => x – 3 = -4/15

   => x = -4/15 + 3

   => x = -4/15 + 45/15

   => x = 41/15

   Vậy x = 41/15

   __

   a) 3/5 : x – 2/3 = 4/4

   => 3/5 : x – 2/3 = 1

   => 3/5 : x = 1 + 2/3

   => 3/5 : x = 3/3 + 2/3

   => 3/5 : x = 5/3

   => x = 3/5 : 5/3

   => x = 3/5 . 3/5

   => x = 9/25

   Vậy x = 9/25

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2. Giải đáp:

    

   Lời giải và giải thích chi tiết:

   b ) 1 /5 − 1 /2 ( x − 3 ) = 1 /3

   1 /2 ( x − 3 )=1/5-1/3

   1 /2 ( x − 3 )=3/15-5/15

   1 /2 ( x − 3 )=-2/15

   x − 3=-2/15xx 2/1

   x − 3=-4/15

   x=-4/15+45/15

   x=41/15

   ______________________

   a ) 3 /5 : x − 2 /3 = 4 /4

   3/ 5 : x − 2 /3 = 1

    3/ 5 : x = 1 + 2 /3

    3 /5 : x = 3 /3 + 2 /3

    3 /5 : x = 5 /3

    x = 3/ 5 : 5 /3

   x = 3 /5 × 3/ 5

    x = 9/ 25

   $@TranDuyAnh123$

   Trả lời