Ta có : \(\frac{x}{2}-\frac{x}{3}=-2\)
\(\Leftrightarrow x\frac{1}{2}-x\frac{1}{3}=-2\)
\(\Leftrightarrow x\left(\frac{1}{2}-\frac{1}{3}\right)=-2\)
\(\Leftrightarrow\frac{1}{6}x=-2\)
\(\Rightarrow x=-2.6=-12\)
|(x+1/2).|2x-3/4||=2x-3/4 tim x biet
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
tim x biet (2x-3)^2-4(x+1)^2=5
tim x biet |2x+3|-2|4-x|=5
Tim xthuoc Z biet:
1,|2x-5|-|2x+9|=0
2,|x+1|-|x+2|-|3-x|=7
3,|2x+3|+|3x+2|-|4-x|=10
tim x biet (2x-3)^2-4.(x+1)^2=5
Tim x,y,z biet:2(x-1)-3(2x+2)-4(2x+3)=16
giai day du
tim x , biet :
1 ) 2017 - \ x - 2017 \ = x
2) -1/2 . ( 3x - 1 ) + 3/4 . ( 3-2x) = -3 . ( x/2 - 1 ) - ( 4/5) mu -1
tim x biet :
( 2-x ) x (4/5-x ) < 0
(x - 3/2) x ( 2x + 1 ) > 0
