tìm x :
(19/9-15/2135:9/4270):x=222/333.2121/4040:132132/660660
x-1/27=-3/1-x
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mình cần gấp nhé!giúp mk.
1)so sánh:(-1/2)^5^1^3 với (-1/3)^3^1^5
2)tìm x:(19/9-15/2135:9/4270):x=222/333*2121/4040:132132/660660
Tìm x, biết :
a) \(\frac{x-1}{27}=\frac{-3}{1-x}\)
b) \(\left(2\frac{1}{9}-\frac{15}{2135}:\frac{9}{4270}\right):x=\frac{222}{333}.\frac{2121}{4040}:\frac{132132}{660660}\)
\(\frac{x-1}{27}=\frac{-3}{1-x}\)
\(\Rightarrow\frac{x-1}{27}=\frac{3}{x-1}\)
\(\Rightarrow\left(x-1\right)^2=81\)
\(\Rightarrow x-1=\pm9\)
Làm nốt nhassssso
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bài 1 tính 1/2016 + 2017x 2015/2016 - 2016
bài 2 tìm X biết rằng ( hỗn số 2 và 1/9 - 15/2135 : 9/4270 ) : x = 222/333 : 212/4040 : 132132/660660
ZẢI DÙM MÌNH NHAK ! MÌNH CẦN GẤP LẮM CHIỀU CÓ TIẾT RỒI!
Tìm x biết rằng
(2\(\frac{1}{9}\) - \(\frac{15}{2135}\) : \(\frac{9}{4270}\) ) : x = \(\frac{222}{333}\) : \(\frac{2121}{4040}\) : \(\frac{132132}{660660}\)
mọi người giúp vs
Ta có :
\(\frac{222}{333}=\frac{2}{3}\)
\(\frac{2121}{4040}=\frac{21}{40}\)
\(\frac{132132}{660660}=\frac{1}{5}\)
=> \(\frac{222}{333}:\frac{2121}{4040}:\frac{132132}{660660}=\frac{400}{63}\)
Thay vế phải vào ta được :
\(\left(2\frac{1}{9}-\frac{15}{2135}:\frac{9}{4270}\right):x=\frac{400}{63}\)
\(\Rightarrow\left(-\frac{11}{9}\right):x=\frac{400}{63}\)
\(\Rightarrow x=-\frac{11}{9}:\frac{400}{63}\)
\(\Rightarrow x=-\frac{77}{400}\)
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Ta có:(2\(\dfrac{1}{9}\)-\(\dfrac{15}{2135}\) :\(\dfrac{9}{4270}\)): x= \(\dfrac{222}{333}\): \(\dfrac{2121}{4040}\): \(\dfrac{132132}{660660}\)
Suy ra (\(\dfrac{19}{9}\)-\(\dfrac{15}{2135}\) . \(\dfrac{4270}{9}\)): x= \(\dfrac{2}{3}\). \(\dfrac{40}{21}\) . 5
Suy ra (\(\dfrac{19}{9}\)-\(\dfrac{10}{3}\)): x=\(\dfrac{400}{63}\)
(\(\dfrac{-11}{9}\)):x =\(\dfrac{400}{63}\)
Suy ra x= (\(\dfrac{-11}{9}\)):\(\dfrac{400}{63}\) Vậy x=\(\dfrac{-77}{400}\)
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a, 3^3x+2/9^x=815
b, (x+1)+(x+2)+(x+3)+ ...+(x+100)=5750
Tìm x hộ tôi nha!!!!!!!
Bài 2:So sánh
a;222^333 và 333^222
b;21^15 và 27^5.49^8
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
6. 27/35 x 5/9 - 2/7 x -7/5
7. 10/13 x 13/5 + {-9/5} x 10/3
8. 100/27 x 9/20 + 40% x 5/3
9. 1,5 x 5/12 + 1/4 x 3/4
10. 2 1/2 x 7/5 + {-9/10} x 2/3
11. X + 45% = 2 1/2 -5/3
12. 80% + X = -5/2 + 3/4
13. 4/25 - X =-5/2 + -3/10
1: =-2/9(15/17+2/17)=-2/9
2: \(=\dfrac{-6}{3}+\dfrac{-21}{90}\)
=-2-7/30=-67/30
3: \(=\dfrac{3}{4}\cdot\dfrac{7}{5}+\dfrac{9}{7}\cdot\dfrac{3}{2}\)
=21/20+27/14=417/140
4: =-25/13(5/19+14/19)=-25/13
5: =-7/5-45/21=-7/5-15/7=-124/35
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1: =-2/9(15/17+2/17)=-2/9
2: =34⋅75+97⋅32=34⋅75+97⋅32
=21/20+27/14=417/140
4: =-25/13(5/19+14/19)=-25/13
5: =-7/5-45/21=-7/5-15/7=-124/35
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1) -5+x=12
2) 3-x=-7
3) 9-(x+3)=-12+x
4) 3-x=23-(-7)
5) x-15=(-11)-19
6) 15-27=(19-x)- (27+19)
7) | x-2 |=0
8) | 5-x |+3=5
9) | 4+x |+10+8
10) | x+1 |- 4=5
Trình bày cách làm dùm mình lun nhé !!! Nếu đúng mình **** cho !!!!!!!!!!!!!
6)
(19-x)-46=-12
19-x=-12+46
19-x=34
x=19-34
x=-15
7)=>x-2=0
x=0+2
x=2
8)=>5-x=2
x=5-2
x=3
9) đề thiếu
10)=>x+1=9
x=9-4
x=8
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Ai tick cho tớ 4 cái cho tròn cho đẹp
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1)-5+x=12
x=12-(-5)
x=7
2)3-x=-7
x=3-(-7)
x=10
4) 3-x=23-(-7)
3-x=30
x=3-30
x=-27
5) x-15=-30
x=-30+15
x=-15
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21 tháng 7 2023 lúc 12:24
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
1: x=3/4-1/2=3/4-2/4=1/4
2: x-1/5=2/11
=>x=2/11+1/5=21/55
3: x-5/6=16/42-8/56
=>x-5/6=8/21-4/28=5/21
=>x=5/21+5/6=15/14
4: x/5=5/6-19/30
=>x/5=25/30-19/30=6/30=1/5
=>x=1
5: =>|x|=1/3+1/4=7/12
=>x=7/12 hoặc x=-7/12
6: x=-1/2+3/4
=>x=3/4-1/2=1/4
11: x-(-6/12)=9/48
=>x+1/2=3/16
=>x=3/16-1/2=-5/16
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1)x= 1/4
2)x= 2/11+ 1/5
x= 21/55
3)x - 5/6 = 5/21
x = 5/21+5/6
x = 15/14
4)x/5 = 5/6 + -19/30
x:5 = 1/5
x = 1/5.5
x = 1
5) |x| - 1/4 = 6/18
|x| = 6/18 - 1/4
|x| =7/12
⇒x= 7/12 hoặc -7/12
6)x = -1/2 +3/4
x= 1/4
7) x/15 = 3/5 + -2/3
x:15 = -1/15
x = -1/15. 15
x = -1
8)11/8 + 13/6 = 85/x
85/24 = 85/x
⇒ x = 24
9) x - 7/8 = 13/12
x = 13/12 + 7/8
x = 47/24
10)x - -6/15 = 4/27
x = 4/27 + (-6/15)
x = -34/135
11) -(-6/12)+x = 9/48
x= 9/48 - 6/12
x = -5/16
12) x - 4/6 = 5/25 + -7/15
x -4/6 = -4/15
x = -4/15 + 4/6
x = 2/5
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Tính nhanh: LƯU Ý tất cả số dưới đây đều là phân số
1,1/8 x 2/5 + 3/5 + 1/8
2,( -1)/15 x 2/5 + (-5)/3 x (-1)/13
3,4/9 : 11/6 + 5/9 x 6/11
4,5/19 x 7/13 + 7/19 x 8/13 - 3 x 7/19
5, 2/7 x 4/23 - 2/7 x 27/23 + 2/7
6,3/8 x 3/7 +3/8 x 4/7 + 11/8
7,-5/27 : 6/11 - 16/11 x 5/27 - 5/27
8, 5/16 x 7/8 - 5/16 x 1/8 + 10/8 :16/5
9,1/3 x 39/17 - 129/3 x 1/17
10,5/2 : 23/3 - 3/2 x 7/23
2: \(=\dfrac{-2}{75}+\dfrac{5}{39}=\dfrac{33}{325}\)
3: \(=\dfrac{6}{11}\left(\dfrac{4}{9}+\dfrac{5}{9}\right)=\dfrac{6}{11}\)
4: \(=\dfrac{7}{19}\left(\dfrac{5}{13}+\dfrac{8}{13}-1\right)=-2\cdot\dfrac{7}{19}=-\dfrac{14}{19}\)
5: \(=\dfrac{2}{7}\left(\dfrac{4}{23}-\dfrac{27}{23}+1\right)=0\)
6: \(=\dfrac{3}{8}\left(\dfrac{3}{7}+\dfrac{4}{7}\right)+\dfrac{11}{8}=\dfrac{3}{8}+\dfrac{11}{8}=\dfrac{14}{8}=\dfrac{7}{4}\)
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