A) (x-3 ) : 1/2 =5/3 B) 3/4 :( 2/3 x -1/2) =1/9 C)3/2 : (2x+3/4) = 1/2 D) -3/4 :(2x -1/3 ) = 1/2

2 bình luận về “A) (x-3 ) : 1/2 =5/3 B) 3/4 :( 2/3 x -1/2) =1/9 C)3/2 : (2x+3/4) = 1/2 D) -3/4 :(2x -1/3 ) = 1/2”

1. Giải đáp + Lời giải và giải thích chi tiết:

   a) ( x – 3 ) : 1/2 = 5/3

   -> x – 3 = 5/2 xx 1/2

   -> x – 3 = 5/4

   -> x = 5/4 + 3

   -> x = 5/4 + 12/4

   -> x = 17/4

   text{Vậy x = 17/4 

   b) 3/4 : ( 2/3x – 1/2 ) = 1/9

   -> 2/3x – 1/2 = 3/4 : 1/9

   -> 2/3x – 1/2 = 3/4 xx 9/1

   -> 2/3x – 1/2 = 27/4

   -> 2/3x = 27/4 + 1/2

   -> 2/3x = 27/4 + 2/4

   -> 2/3x = 29/4

   -> x = 29/4 : 2/3

   -> x = 29/4 xx 3/2

   -> x = 87/8

   text{Vậy x =87/8

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

   -> 2x + 3/4 = 3/2 : 1/2

   -> 2x + 3/4 = 3/2 xx 2/1

   -> 2x + 3/4 = 3

   -> 2x = 3 – 3/4

   -> 2x = 12/4 – 3/4

   -> 2x = 9/4

   -> x = 9/4 : 2

   -> x = 9/4 xx 1/2

   -> x = 9/8

   text{Vậy x = 9/8

   d) -3/4 : ( 2x – 1/3 ) = 1/2

   -> 2x – 1/3 = -3/4 : 1/2

   -> 2x – 1/3 = -3/4 xx 2/1

   -> 2x – 1/3 = -3/2

   -> 2x = -3/2 + 1/3

   -> 2x = -9/6 + 2/6

   -> 2x = -7/6

   -> x = -7/6 : 2

   -> x = -7/6 xx 1/2

   -> x = -7/12

   text{Vậy x = -7/12

   @hk10

   Trả lời
2. a) (x-3 ) : 1/2 =5/3

   x-3=5/3×1/2

   x-3= 5/6

   x=5/6+3

   x=23/6

   Vậy x=23/6

   ——————————-

   b)3/4 🙁 2/3x -1/2) =1/9

   2/3x-1/2=3/4:1/9

   2/3x-1/2=27/4

   2/3x=27/4+1/2

   2/3x=29/4

   x=29/4:2/3

   x=87/8

   Vậyx=87/8

   ——————————

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

   2x+3/4=3/2:1/2

   2x+3/4=3

   2x=3-3/4

   2x=9/4

   x=9/4:2

   x=9/8

   Vậy x=9/8

   —————————–

   d) -3/4 :(2x -1/3 ) = 1/2

   2x-1/3=-3/4:1/2

   2x-1/3=-3/2

   2x=-3/2+1/3

   2x=-7/6

   x=-7/6:2

   x=-7/12

   Vậy x=-7/12

   Trả lời