\(\left|x-1\right|+\left|2x-2\right|=9\\ \Rightarrow\left|x-1\right|+2\left|x-1\right|=9\\ \Rightarrow3\left|x-1\right|=9\\ \Rightarrow\left|x-1\right|=3\\ \Rightarrow\left[{}\begin{matrix}x-1=3\\x-1=-3\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=4\\x=-2\end{matrix}\right.\)
Giúp vs ạ, cần trước 5 h chiều
I) Tìm x biết:
1)
a, l \(\frac{1}{2}x\)l =3 - 2x
b, lx-1l = 3x + 2
c) l 5xl =x - 12
d) l 17-x l =5x+1
2)
a, l 9+x l =2x
b) l 5xl -3x =2
c) lx+6l - 9 =2x
d, l 2x-3 l +x =21
3,
a, l 4+2x l = -4x
b, l3x-1l + 2 = x
c) l x+15l +1 = 3x
d, l 2x-5 l +x = 2
4,
a, l 2x - 5 l = x+1
b, l 3x -2 l -1 + x
c) l 3x -7l = 2x +1
d, l2x -1l +1 = x
Tìm x biết : a) x+3/22=-27/121.11/9 b) (3và2/20-2và1/20)x+2/7=3/5 c) |3/2x-5|-1/2=-1/4
Tìm x để :
a) 1-2x <5 b)(x-2)^2. (x+1)(x-4) <0 c) 5/x <1 e) x^2 *(x-3)/x-9 <0
MONG MN GIÚP ĐỠ Ạ =))))
Cảm Ơn nhiều =))))
a) 3^2x-1=243
b) 3^x+1=9^x
c) (4/7-1/2x)^3=-8/34
tìm tập các gt của x biết
a (x-1)(x-2)>0 b. 2x-3<0 c. 92x-4)(9-3x)>0 d.\(\frac{2x}{3}-\frac{3}{4}\) >0
4.(-1/2)^3-2.(-1/2)^2+3.(-1/2)+1
3/5.x-1/2=-1/7
5-|3x-1|=3
(1-2x)^2=9
Giải giúp mk vs ạ !!! Mk đg cần rất gấp :(((
1. tìm x
a, 2x - \(\dfrac{1}{2}\) : \(\dfrac{3}{4}\) = \(\dfrac{12}{9}\)
b, x\(^2\) - 2 = 0
2. Cho
A = \(\dfrac{1,11+0,19-13.2}{2,06+0,54}\) - \(\left(\dfrac{1}{2}+\dfrac{1}{4}\right)\) : 2
B = \(\left(5\dfrac{7}{8}-2\dfrac{1}{4}-0,5\right)\) : \(2\dfrac{23}{26}\)
a, Rút gọn A, B
b, Tìm x ϵ Z để A < x < B
1. tìm x biết
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) = 0
c, 5 - x\(^2\) = 1
d, x - 2\(\sqrt{x}\) = 0
g, (x - 1) + \(\dfrac{1}{7}\) = 0
tìm x
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) - 0
c, x - 2\(\sqrt{x}\) = 0
d, (x - 1)\(^2\) + 1/7 = 0
Tìm x:
a)\(2x\left(x-\frac{1}{7}\right)=0\)
b)\(\frac{1}{2}x+\frac{3}{5}x=\frac{-33}{25}\)
c)\(\left(\frac{2}{3}x-\frac{4}{9}\right)\left(\frac{1}{2}+\frac{-3}{7}:x\right)=0\)
