giúp mk vs ah bài 1 a) 2/5-(-x)=3/4-(-2)/3 b) -3/29-2/29 ≤ x/29<5/29-7/29 c) 1/6-2/5

06/12/2021

By Kennedy

giúp mk vs ah
bài 1
a) 2/5-(-x)=3/4-(-2)/3
b) -3/29-2/29 ≤ x/29<5/29-7/29 c) 1/6-2/5 { "@context": "https://schema.org", "@type": "QAPage", "mainEntity": { "@type": "Question", "name": " giúp mk vs ah bài 1 a) 2/5-(-x)=3/4-(-2)/3 b) -3/29-2/29 ≤ x/29<5/29-7/29 c) 1/6-2/5

0 bình luận về “giúp mk vs ah bài 1 a) 2/5-(-x)=3/4-(-2)/3 b) -3/29-2/29 ≤ x/29<5/29-7/29 c) 1/6-2/5<x/30 ≤1/2-8/15 bài 2 a=(-1/5-(-3)/12)-1/4 b=(1/4+(-5)/13)+(3/4”

1. Đáp án:

    

   Giải thích các bước giải:

    Bài 1:

   a)

   2/5-(-x) = 3/4-(-2/3)

   2/5+x = 3/4+2/3

   2/5+x = 17/12

   x = 17/12-2/5

   x = 61/60

   c) 

   1/6-2/5< x/30≤1/2-8/15

   -7/30< x/30 ≤ -1/30

   Suy ra x thuộc {-6;-5;-4;-3;-2;-1}

   b) -3/29-2/29≤x/29<-5/29-7/29

   -5/29≤x/29<-2/29

   Suy ra x thuộc{-5;-4:-3}

   Bài 2:

   A= (-1/5+3/12)-1/4

   = -1/15-1/4

   = -19/60

   B=(-1/4+(-5)/13) + (3/4+ -8/13+3/4)

   = (-7/52) + (6/4+ -8/13)

   = (-7/52)+ (43/52)

   = 36/52

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