\(\left|x+1\right|-9=-7\)
\(\Rightarrow\left[{}\begin{matrix}x+1=2\\x+1=-2\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=2-1\\x=\left(-2\right)-1\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=1\\x=-3\end{matrix}\right.\)
Vậy ..................
tim x:
a, \(\dfrac{1}{2}x+\dfrac{3}{5}x=\dfrac{-33}{25}\)
b, \(\left(\dfrac{2}{3}x-\dfrac{4}{9}\right)\left(\dfrac{1}{2}+\dfrac{-3}{7}:x\right)=0\)
tim x biet:a)/x+1/+/3x-1/+/x-1/=3
b)/x-2/+/x-7/=4
\(\dfrac{7^{x+2}+7^{x+1}+7^x}{57}=\dfrac{5^{2x}+5^{2x+1}+5^{2x+3}}{131}\)
tim x
Tim x để biểu thức A = | x – 3| + | x + 7| + | x + 1| đạt giá trị nhỏ nhất.
\(\left|x-1\right|+1\)=22\(\dfrac{9}{2013}\)
Tim x
tim x
a)x-5/x-3 >0
b)x+8/x-9<0
c) (x+1)/2017 +(x+2)/2016 +(x+3)/2015 +(x+4)/2014 +4=0
tim gia tri nguyen cua x de bieu thuc:x^2+7/x+1 cung nhan gia tri la so nguyen
Tim x∈Z thoa man 33n+1=9n+2
Tim x∈Z thoa man 33n+1 = 9n+2
