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”
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