a 4/5×8/2xX/7=96/105 b 1/4×3/Xx11/5=231/200 đây là bài tìm x

1 bình luận về “a 4/5×8/2xX/7=96/105 b 1/4×3/Xx11/5=231/200 đây là bài tìm x”

1. a) 4/5 xx 8/2 xx x/7 = 96/105

   16/5 xx x/7 = 96/105

   x/7 = 96/105 : 16/5

   x/7 = 96/105 xx 5/16

   x/7 = 2/7

   Suy ra x = 7

   Vậy x = 7

   b) 1/4 xx 3/x xx 11/5 = 231/200

   1/4 xx 3/x = 231/200 : 11/5

   1/4 xx 3/x = 231/200 xx 5/11

   1/4 xx 3/x = 21/40

   3/x = 21/40 : 1/4

   3/x = 21/40 xx 4

   3/x = 21/10

   3 : x = 21/10

   x = 3 : 21/10

   x = 10/7

   Vậy x = 10/7

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