\(\left|x-2\right|+3x=8\)
\(\Leftrightarrow\left|x-2\right|=8-3x\)
\(\Leftrightarrow\left[{}\begin{matrix}x-2=8-3x\\x-2=-\left(8-3x\right)\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x-2=8-3x\\x-2=-8+3x\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}4x=10\\-2x=-6\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{5}{2}\\x=3\end{matrix}\right.\)
cho hai đa thức F(x) = 6^2- 5x+8+3x-3x^2 + 3x^3 ; G(x) = 12x^2- 6 - 9x^2 + 3x^3
tìm x để F(x) =G(x)
Rút gọn biểu thức P= |3x-6|-3x+5. Với x≥2 Q=|8-2x|+3x+8. Với x≥4 R= 4x+5-4|x+5|. Với x≤5
1, 3/x-7/-12/4x+8/=3x-8
2, -5/x-7/+3/3-x/=12x-8
3, /x-7/ -/3x-5/=0
a) |2x-5|=|3x-8| b) |x+5|=|3x-2| c) |2/5-x/4|=|3-x|
|3x-2|+|2-3x|=8 tìm x
a, |x-1\2|+2x=6
b, 3x+|2\3-x|+2=0
c, 7x+6+|3x-18|=x-1
d,4x-|8-4x|-6=0
e,12-|3x-4|=8-2x
Tìm x :3x/8=6/x
[x-2]/2=-8/x-2
1, Tìm x
a,3x.(2x+3)-(2x+5).(3x-2)=8
b,5x(x+2)-x.(2x-7)-3x^2=81
tìm x và y biết 3x-2/8=5y+6/3=3x-5y-8/10x
Tìm x,tính nhanh:
a.\(2x^2+5x+8+\sqrt{x}=x^2+3x+35+x^2+2x-7.\)
b.\(3\sqrt{x}+7x+5=\sqrt{x}+4x-6+3x+18\)
c.\(8\sqrt{x}+2x-9=5x+7+6\sqrt{x}-3x-12\)
d.\(2\sqrt{3x}+11x-18=5x+3+6\sqrt{3x}+6x-21\)
