Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
a. x:(1/2+2/3)=6/5
=>x:7/6=6/5
=>x=6/5*7/6=>x=7/5
b.(x-1/2)-5(x-2/3)=3/2x
=>x-1/2-5x+10/3=3/2x
=>-4x+17/6=3/2x
=>17/6x=3/2x--4x
=>17/6=x(3/2+4)=>17/6=11/2x=>x=17/33
c.-5(x+1/5)-1/2(x-2/3)=x
=>-5x-1-1/2x+1/3=x=>-11/2x-2/3=x
=>-2/3=x+11/2x=>-2/3=x(1+11/2)=>-2/3=13/2x
=>x=-4/39
a) x : (1/2 + 2/3) = 6/5
=> x : 7/6 = 6/5
=> x = 6/5 x 7/6
x = 7/5
b) , c) ko bít hihi
`a, 1/2 +x=3/4`
`=> x= 3/4 -1/2`
`=> x= 3/4-2/4`
`=>x= 1/4`
`b, 5/2 -x=1/3`
`=> x= 5/2 -1/3`
`=> x= 15/6 - 2/6`
`=>x= 13/6`
`c, 2 . (1/3 +x)=1/5`
`=> 1/3 +x=1/5:2`
`=> 1/3 +x= 1/10`
`=>x= 1/10-1/3`
`=>x= 3/30 - 10/30`
`=>x=-7/30`
`d, 2/3 - (1/2 -x)=1/5`
`=> 1/2-x= 2/3 -1/5`
`=>1/2-x= 10/15 - 3/15`
`=>1/2-x=7/15`
`=>x= 1/2-7/15`
`=>x=1/30`
`1/2 + x = 3/4`
`=> x = 3/4 - 1/2`
`=> x = 1/4`
`5/2 - x = 1/3`
`=> x = 5/2 - 1/3`
`=> x = 13/6`
`2.(1/3 + x) = 1/5`
`=>1/3 + x = 1/10 `
`=> x = 1/10 - 1/3`
`=> x = -7/30`
`2/3 - (1/2 -x)= 1/5`
`=> 1/2 - x = 7/15`
`=> x = 1/2 - 7/15`
`=> x = 1/30`
Các bạn giúp mình giải với nhé! Đúng thì mình k đúng nhé. Cảm ơn các bạn nhiều lắm. Yêu cả nhà.
\(1.\left(x-5\right)^{23}.\left(y+2\right)^7=0\)
\(\Rightarrow\hept{\begin{cases}\left(x-5\right)^{23}=0\\\left(y+2\right)^7=0\end{cases}\Rightarrow\hept{\begin{cases}\left(x-5\right)^{23}=0^{23}\\\left(y+2\right)^7=0^7\end{cases}}}\)\(\Rightarrow\hept{\begin{cases}x-5=0\\y+2=0\end{cases}\Rightarrow\hept{\begin{cases}x=0+5\\y=0-2\end{cases}}}\)\(\Rightarrow\hept{\begin{cases}x=5\\y=-2\end{cases}}\)
Vậy \(\left(x;y\right)=\left(5;-2\right)\)
(2/5+4/5+1/2+3/5).x=1
23/10.x=1
x=1:31/10
x=10/23
ủng hộ mik nhé
-5(x+1/5)-1/2(x-2/3)=3/2x-5/6
-5x-5.1/5-1/2x+1/2.2/3=3/2x-5/6
-5x-1-1/2x+1/3=3/2x-5/6
(-5x-1/2x)-(1-1/3)=3/2x-5/6
-11/2x-2/3=3/2x-5/6
-11/2x-3/2x=2/3-5/6
-7x=-1/6
x=-1/6:(-7)
x=1/42
a. 2x+\(\dfrac{4}{5}\)=0 hoặc 3x-\(\dfrac{1}{2}\)=0
2x=- 4/5 hoặc 3x=1/2
x=-2/5 hoặc x=\(\dfrac{1}{6}\)
b. x-\(\dfrac{2}{5}\)=0 hoặc x+\(\dfrac{4}{7}\)=0
x=2/5 hoặc x=-\(\dfrac{4}{7}\)
d. x(1+5/8-12/16)=1
\(\dfrac{7}{8}\)x=1=> x=8/7
\(\frac{2}{5}.\frac{1}{x}+\frac{1}{x.2}+\frac{2}{5}=0.5\)
\(\frac{2}{5}.\frac{1}{x}+\frac{1}{2}.\frac{1}{x}+\frac{2}{5}=0.5\)
\(\frac{1}{x}\left(\frac{2}{5}+\frac{1}{2}\right)+\frac{2}{5}=0.5\)
\(\frac{1}{x}.\frac{9}{10}+\frac{2}{5}=0.5\)
\(\frac{1}{x}.\frac{9}{10}=\frac{1}{2}-\frac{2}{5}\)
\(\frac{1}{x}.\frac{9}{10}=\frac{1}{10}\)
\(\frac{1}{x}=\frac{1}{10}:\frac{9}{10}\)
\(\frac{1}{x}=\frac{1}{10}.\frac{10}{9}\)
\(\frac{1}{x}=\frac{1}{9}\)
\(\Rightarrow x=\frac{9.1}{1}=9\)
1/5-1/5:x=(-2)^2
1/5-1/5x=4
x/5x-1/5x=4
x-1/5x=4
x-1=4.5x
x-1=20x
1=x-20x
1=(-19).x
x=1:(-19)
x=1/-19=-1/19
Vậy x= -1/19
1/5-1/5: x = 4
-1/5:x = 4+ -1/5
-1/5:x = 19/5
x= 19/5 x -1/5
x-19/25