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(52-2):2+1=26
(52+2)*26:2=741
1092-741=351
351:26=13,5
Đ/s: 13,5
Không biết đúng không đâu,đừng làm theo nha,ngu cả đời đấy,kb nha
15 nha các cậu,đúng 100000000000000000000% luôn,kiểm tra rùi ,hihi ,sory nha
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(x:\frac{1}{2}+\frac{3}{4}=1\frac{19}{20}\)
\(x:\frac{1}{2}+\frac{3}{4}=\frac{39}{20}\)
\(x:\frac{1}{2}=\frac{39}{20}-\frac{3}{4}\)
\(x:\frac{1}{2}=\frac{39}{20}-\frac{15}{20}\)
\(x:\frac{1}{2}=\frac{24}{20}\)
\(x=\frac{24}{20}.\frac{1}{2}\)
\(x=\frac{3}{5}\)
\(x:\frac{1}{2}+\frac{3}{4}=1\frac{19}{20}\)
\(x:\frac{1}{2}=1\frac{19}{20}-\frac{3}{4}\)
\(x:\frac{1}{2}=\frac{39}{20}-\frac{3}{4}\)
\(x:\frac{1}{2}=\frac{39}{20}-\frac{15}{20}\)
\(x:\frac{1}{2}=\frac{24}{20}\)
\(x=\frac{24}{20}\times\frac{1}{2}\)
\(x=\frac{24}{40}\)
\(x=\frac{3}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
sorry tui làm sai câu này!!!
2/3 +4/37 +5/111 +260 /1443
=962/1443+156/1443+65/1443+260/1443
= 962+156+65+260/1443=1
tìm x
1)1/2 - ( x+3/14) = 1/6
=> x+3/14=1/2-1/6
=> x= 1/3 - 3/14
=> x= 5/42
2)( x- 1/3 ) -5/2 = 1/7
=> x-1/3= 1/7+5/2
=> x= 37/14+1/3
=> x= 125/42
3)5/8 + ( x- 1/4 ) = 4/3
=>x-1/4=4/3-5/8
=>x= 17/24 +1/4
=> x= 23/24
4) 4/3 - ( 1/4 -x ) =1
=>1/4-x=4/3-1
=>x=1/4-1/3
=> x= -1/12
Chúc bạn Hk tốt!!!
2/3 +4/37 +5/111 +260 /1443\(=\frac{635}{629}\)
Tìm x
1. \(x=\frac{5}{42}\)
2. \(x=\frac{125}{42}\)
3. \(x=\frac{23}{24}\)
4. \(x=-\frac{1}{12}\)
Chúc bạn Hk tốt!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
Mình chỉ làm 1 câu thôi nhé
a,
Ta có:
\(\frac{1}{7}+\frac{2}{7x}=\frac{3}{2}\)
\(\Rightarrow\frac{x+2}{7x}=\frac{3}{2}\)
=> 2x+4=21x
=> 4=19x
=> x=4/19
Chắc vậy á :)
\(\frac{1}{7}+\frac{2}{7}:x=\frac{3}{2}\)
\(\Rightarrow\frac{2}{7}:x=\frac{3}{2}-\frac{1}{7}\)
\(\Rightarrow\frac{2}{7}:x=\frac{21}{14}-\frac{2}{14}\)
\(\Rightarrow\frac{2}{7}:x=\frac{19}{14}\)
\(\Rightarrow x=\frac{2}{7}:\frac{19}{14}\)
\(\Rightarrow x=\frac{2}{7}\times\frac{14}{19}\)
\(\Rightarrow x=\frac{4}{19}\)
Vậy \(x=\frac{4}{19}\)
~ Ủng hộ nhé
![](https://rs.olm.vn/images/avt/0.png?1311)
( x + 1 ) + ( x + 2 ) + ( x + 3 ) = 100
=> 3x + 6 = 100
=> 3x = 94
=> x = \(\frac{94}{3}\)
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)=100\)
\(\Rightarrow3x+6=100\)
\(\Rightarrow3x=94\)
\(\Rightarrow x=\frac{94}{3}\)
Vậy...
![](https://rs.olm.vn/images/avt/0.png?1311)
Bài 2:
a,4x25x0,25x\(\frac{1}{5}\) x \(\frac{1}{2}\) x 2
=4x25x0,25x0,2x0,5x2
=(4x0,25)+(25x0,2)+(0,5x2)
= 1 + 5 1
=7
X + 1/2 + X + 1/4 + X + 1/8 + X + 1/8 +X +1/16
= X + 8/16 + X + 4/16 + X + 2/16 + X + 2/16 +X + 1/16
= X + ( 8/16 + 4/16 + 2/16 + 2/16 ) + X +1/16
= X + 1 + X + 1/16
= X + ( 1 + 1/16 )
= X + 1 VÀ 1/16
![](https://rs.olm.vn/images/avt/0.png?1311)
\(5\frac{4}{7}\) + ( x-2 ) x 1/3 = \(17\frac{3}{4}\)
39/7 + ( x- 2 ) x 1/3 = 71/4
( x -2 ) x 1/3 = 71/4 - 39/7
( x -2 ) x 1/3 = 341/28
x - 2 = 341/28 : 1/3
x -2 = 341/28 x 3
x -2 = 1023/28
x = 1023/28 + 2
x = 1079/28
P/s : số lớn tek!?
Cbht!!!!!
\(\frac{\frac{5}{4}}{7}+\left(x-2\right)\times\frac{1}{3}=\frac{\frac{17}{3}}{4}\)
\(\frac{35}{4}+\left(x-2\right)\times\frac{1}{3}=\frac{68}{3}\)
\(\frac{35}{4}+\left(x-2\right)=68\)
\(x-2=68-8,75\)
\(x-2=59,25\)
\(x=59,25+2\)
\(x=61,25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
`x : 3 + x : 4 = 20`
`x : (3 + 4) = 20`
`x : 7 = 20`
`x = 20 xx 7`
`x =140`
\(\left(x+1\right)+\left(x+2\right)+\left(x+3\right)+\left(x+4\right)+\left(x+5\right)+\left(x+6\right)=20\)
\(\Leftrightarrow x+\left(1+2+3+4+5+6\right)=20\)
\(\Rightarrow x+21=20\)
\(\Rightarrow x=20-21\)
\(\Rightarrow x=-1\)
6*x+21=20