Ta có : | 2x - 1 | + | 1 - 2x | = 8
\(\Leftrightarrow\)| 2x - 1 | + | 2x - 1 | = 8
\(\Leftrightarrow\)2 . | 2x - 1 | = 8
\(\Leftrightarrow\)| 2x - 1 | = 4
\(\Rightarrow\)2x - 1 = 4 hoặc 2x - 1 = - 4
\(\Rightarrow\)x = 5 / 2 hoặc x = - 3 / 2
Vậy : x = 5 / 2 hoặc x = - 3 / 2
Tim x biet |2x-1|+|1-2x|=8
Tim x, biet: I 2x-1 I + I 1-2x I = 8
a,tim x biet |x-2|+|3-2x|=2x+1
b,tim x,y thuoc Z biet xy+2x-y=5
c, tinh A=(1-1/15)(1-1/21)(1-1/28).....(1-1/210)
tim cap so x,y nguyen biet :
a,\(|2x+3|+|2x-1|=\frac{8}{2|x-5|+2}\)
tim x biet :
a) |x+1| +|x-5| = 7
b)|2x + 5|=3x-8
a, Tim x biet:/x-2/+/3-2x/=2x+1
b, Tim x,y thuoc Z biet:xy+2x-y=5
c, tim x,y,z, biet :2x=3y;4y=5zva 4x-3y+5z=7
tim x biet 2x+1/x-2=2x-3/x+6
tim x biet (2x+1/2)^2-(1-2x)^2=2
tim x biet
|2x+1|+|2x+2|+|2x+3|+...+|2x+1007|=2015x
