||\(3x-\dfrac{7}{3}\)|\(-2\)|\(=7\)
[\(\dfrac{1}{2}\)x-3].[\(\dfrac{2}{3}\)x+\(\dfrac{1}{2}\)]=0
|2x|-|-2.5|=|-7.5
|1-3x|=x-7 [ dieu kien : x-7>,=0]
1, \(\dfrac{x}{3}=\dfrac{y}{2}\); \(\dfrac{x}{5}=\dfrac{x}{7}\) và x +2y = -112
2, 2x = 3y; 5y = 7z và 3x - 7y + 5z = 30
3, \(\dfrac{x}{y}=\dfrac{10}{9};\) \(\dfrac{y}{z}=\dfrac{3}{4}\) và x +2y - 3z = -48
Làm giúp, cần gấp
A=5+\dfrac{15}{4|3x+7|+3}
a, 3-2 | 4x-5| = \(\dfrac{2}{6}\)
b, | 4-7x | - \(\dfrac{3}{2}\) : 5 = | -1 \(\dfrac{1}{3}\) |
c, ( 7-3x ) ( 2x+ 1 )= 0
d, 2x (5-3x) > 0
e, ( 4-2x) ( 5x +3 ) < 0
g, | 3x + 1 | + | 1 -3x | = 0
mọi người giúp mình nha mình đang cần gấp lắm
tim gtln 5+\(\dfrac{15}{4\left|3x+7\right|+3}\)
Tìm x , biết :
1, |\(\dfrac{3}{2}\)x + \(\dfrac{1}{2}\)| = | 4x - 1 |
2, | \(\dfrac{5}{4}\)x - \(\dfrac{7}{2}\) | - | \(\dfrac{5}{8}x+\dfrac{3}{5}\) | = 0
3, | \(\dfrac{7}{5}x+\dfrac{2}{3}\) | = | \(\dfrac{4}{3}x-\dfrac{1}{4}\) |
4, | \(\dfrac{7}{8}x+\dfrac{5}{6}\) | - | \(\dfrac{1}{2}x+5\) | = 0
Tìm x, biết:
a, \(|2x-3|-\dfrac{5}{2}=\dfrac{1}{3}\)
b, \(|x-1|+3x=1\)
c, \(|5x-3|-x=7\)
d, \(|2x+1|+|x+8|=4x\)
e, \(|3x+2|+|4x+3|=2x-4\)
f, \(|2x-4|+|8-4x|=15\)
g, \(|x^2-2x|=x\)
a) \(\left[\left(-32,47\right)+68,12\right]+32,47\)
b) \(\left[\left(-61,8\right)+\left(-123,6\right)\right]+\left[83,6+61,8\right]\)
c) \(-\left(\dfrac{2}{7}+\dfrac{1}{3}-\dfrac{5}{6}\right)-\left(\dfrac{-9}{7}+\dfrac{14}{7}-\dfrac{1}{5}+\dfrac{5}{3}\right)\)
