\(\left|2x-5\right|+4>25\)
\(\Rightarrow\left|2x-5\right|>21\)
\(\Rightarrow\left[{}\begin{matrix}2x-5>21\\2x-5< -21\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}x>13\\x< -8\end{matrix}\right.\)
a, 10.√x-5=25
b,|1/2x-3/4|-2=-3/2
Tìm x
a) 2x+3/24 = 3x-1/32
b) x+1/x-2 = 5/6
c) -(x+1)/25 = -4/x+1
d) (5-x).2/25 = -2/x-5
e) x+1/x+4 = x-3/x-2
tìm x , biết :
a, \(\dfrac{37-x}{2x+5}=\dfrac{4}{9}\)
b, \(\dfrac{x-2}{x-1}=\dfrac{x+4}{x+7}\)
c, \(\dfrac{x+3}{25}=\dfrac{9}{x+3}\)
d, \(\dfrac{x}{\dfrac{-2}{3}}=\dfrac{5}{-x}\)
e, \(\dfrac{2x-5}{\dfrac{3}{2}}=\dfrac{\dfrac{-27}{8}}{5-2x}\)
f, \(\dfrac{\dfrac{5}{9}}{\left(3x-1\right)^2}=\dfrac{1-2x}{\dfrac{25}{3}}\)
tìm x biết:
a, |2,7-x|=|-0,3|
b, 12/5 -|x+1,5|=0
c, 2. |2x-3|=1/3
d, 7,5-3.|5-2x|=-4/5
e, |3x-4|+|3y+15|=0
ê, |x-y|+ |y+9/25|=0
\(25^{-2x}.5^x=125\)
Tìm x, biết rằng:
1) ( 2x + 1)3 = -0,001
2) ( 2x -3 )4 = ( 2x-3 )6
3) ( 2x+1 )5 = ( 2x+1)2010
4) \(\dfrac{8}{25}=\dfrac{2^x}{5^{x-1}}\)
5) 9x : 3x = 3
6) \(3^x+3^{x+3}=756\)
7) \(5^{x+1}+6.5^{x+1}=875\)
8) \(2^{x-1}.3^{y+1}=12^{x+9}\)
9) \(3^x=9^{y-1}\)
10) \(2^{x+1}.5^y=20^x\)
11) 15x : 3y = 75y
12) \(\dfrac{3}{5}:\dfrac{2x}{15}=\dfrac{1}{2}:\dfrac{4}{5}\)
13) \(\dfrac{x}{2}=\dfrac{y}{3}=\dfrac{z}{4}\) và xy + yz + zx = 104
m=-1,2:(1/1/5.1,25)/0.64-1/25+(1,08-1/25):4/7/(5/5/9-9/4).36/17 +0,6.0.5;2/5
tìm x biết :
25(x+1)^4-26(x+1)^2+1=0
x^2+(x-1)=0
\(\dfrac{x+1}{100}\) +\(\dfrac{x+2}{999}+.....+\dfrac{x+6}{995}+5=0\)
4x^2-4x-5(2x-1)-5=0
m=(-1,2:(1 3/5x1,25) / 0,64 -1/25) +((1,08-2/25):4/ 7 /(5 5/9-9/4)x36/17)+0,6x0,5 :2/5
