=>3.(x-3)=2.(x+1)
<=>3x-9=2x+2
<=>3x-2x=2+9
<=>x=11
=>3.(x-3)=2.(x+1)
<=>3x-9=2x+2
<=>3x-2x=2+9
<=>x=11
Tim x
a, 2(x- 1/3)+3x=7/4
b, x-1/3 == 27/x-1
c, 2x +1/x+3= 2x+3/ x +5
Tick nha!
Tim x,y:
|x-4|+3|3x-2|-2|2-x|=x+1
||2x-3|-3/4|=5/6
|1/2-|3-x||=2x-1
|x-2007|+2004|y-2008|\(\le\)0
3|x-2y|+4|y+1/2|=0
Tim x biet:|x-2|+|3-2x|=2x+1
Tim GTNN,GTLN cua F=1/2(x-1)^2+3
tim x biet (2/5)^x>(2/5)^3.(-2/5)^2
1. CMR:1/1.2+1/3.4+1/5.6+....+1/49.50=1/26+1/27+.......+1/50
2.A=1/1.2+1/2.3+.....+1/99.100.CMR:7/12<A<5/6
3.tim x
a.x+1/10+ x+1/12 +x+1/14 + x+1/16 + x+1/18 + x+1/20
b.x+1/2000 + x+2/1999 =x+3/1998 + x+4/1977
giup minh nha cac ban
Tim x: \(\frac{\frac{-2}{3}}{x} = \dfrac{9}{10}\)
Tim x
\(\left(3x+1\right)^3=27\)
Tim 20 so huu ti x : -1 < x<0
Tim 5 so huu ti x : \(\dfrac{-5}{6}\) <x<\(\dfrac{-3}{4}\)