\(\frac{x+1}{2}=\frac{8}{x+1}\)
\(\Rightarrow\left(x+1\right)^2=16\)
\(\Rightarrow x+1=4\) hoặc \(x+1=-4\)
*\(x+1=4\Rightarrow x=3\)
*\(x+1=-4\Rightarrow x=-5\)
Vậy \(\text{x = 3; x = -5}\)
Tim x
a,-2/3(x-1/4)=1/3(2x-1)
b,1/5.2^x +1/3.2^x+1=1/5.2^7 +1/3.2^8
tim x ,a,x+1/2:(-3/4)=-5/4
b,1-(5 3/8 +x-7 5/24):16 2/3=0
Tim so tu nhien x biet:
a,x+(x+1)+(x+2)+...+(x+2010)=2029099
b,2+4+6+8+...+2x=210
tim x : 1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)-1/1/2010
1: tim x
\(\frac{7+x}{8}\) = \(\frac{x-10}{3}\)
tim x biet -2/3 (x-1/4)=1/3( 2x -1)
Tim x,y thuoc Z
a, |x-1|+|y+2|=0
b, |x-1|+ |y+2|=2
tim x biet:
( 1/2 +1/3+ 1/4+ 1/5+ 1/6 +1/7)x (2009 * x ) = 0.63* 0.12 - 2,1 * 0,036
Tim x
1/2.x+3/5.(x-2)=3
