17x+8-5=2x+(-x+1)
tìm x biết
a,|x+3|-2x=|x-4| ;b,|1-2x|-x=5+2x
c,|10x+7|<37 d,|3-8x|< =19
e,|x-1|=2x-5 f,B=3|x-5|-2|8+4x|
g,|17x-5|-|17x+5|=0 h,|3x+4|=2|2x-9|
i,|x+3|-2x=|x-4| k,|1-2x|-x=5+2x
giúp mk vs .mk cần gấp
tìm x biết
a,|x+3|-2x=|x-4| ;b,|1-2x|-x=5+2x
c,|10x+7|<37 d,|3-8x|< =19
e,|x-1|=2x-5 f,B=3|x-5|-2|8+4x|
g,|17x-5|-|17x+5|=0 h,|3x+4|=2|2x-9|
i,|x+3|-2x=|x-4| k,|1-2x|-x=5+2x
giúp e vs ạ.cần gấp.mai e phải đi học r ạ
giai phuong trinh : \(2x^2\left(5-\sqrt[3]{5x-x^3}\right)=2x^3+17x-8\)
Tìm x:
a. |x - 1| = 2x - 5
b. ||x + 5| - 4| = 3
c. |9 - 7x| = 5x - 3
d. 8x - |4x + 1| = x + 2
e. |17x - 5| - |17x +5| = 0
f. |3x + 4| = 2.|2x - 9|
Bài 1:
a.35 1/6:(-4)/5-46 1/6:(-4)/5
b.1/6+5/6.3/2-3/2+1
c.-1/12-(2 5/8-1/3)
d.-5/4.8/9+-7/16.8/9-2
e.1/6.(-2 3/5)+1 2/5.(-13/5)
Bài 2
a.-5/8+x=(-2/3)^2
b.-1/4-3/4:x=-11/36
c.-22/15x+1/3=/-2/3-1/5/
d./-1/2-x/=1/3
e./2x+3/4/-6=-5
f.-5/7-/1/2-x/=-11/4
g.//x+5/-4/=3
h./17x-5/=/17x+5/
i./x-1/=2x-5
k.(x-1)^3=27
l.(2x-1)^2=25
n.5^x+2=625
m.(2x-1)^3=-8
o.x^2+x=0
1.tìm x
a. |17x-5| -|17x+5|=0
b |3x+4| =2*|2x-9|
2. tìm x
|x^2-3*x|+|(x+1)*(x-3)|=0
1)
a)|17x-5|-|17x+5|=0
17x-5=0 hoặc 17x+5=0
17x=0+5 17x=0-5
17x=5 17x=-5
x=5:17 x=-5:17
x=5/17 x=-5/17
tim x
|9-7X|=5x-3
|17x-5|-|17x+5|=0
|3x+4|=2.|2x-9|
5^x+2=625
(x-1)^x+2=(x-1)6x+4
a: =>|7x-9|=5x-3
\(\Leftrightarrow\left\{{}\begin{matrix}x>=\dfrac{3}{5}\\\left(7x-9-5x+3\right)\left(7x-9+5x-3\right)=0\end{matrix}\right.\)
\(\Leftrightarrow\left\{{}\begin{matrix}x>=\dfrac{3}{5}\\\left(2x-6\right)\left(12x-12\right)=0\end{matrix}\right.\Leftrightarrow x\in\left\{3;1\right\}\)
b: =>|17x-5|=|17x+5|
=>17x-5=17x+5(vô lý) hoặc 17x-5=-17x-5
=>34x=0
hay x=0
c: =>|3x+4|=|4x-18|
=>4x-18=3x+4 hoặc 4x-18=-3x-4
=>x=22 hoặc 7x=14
=>x=22 hoặc x=2
các bạn giúp mik bài này vs
5) (4x-5).(x+2)-(x+5).(x-3)-3x^2-x
6) (x-3).(x+7)-(2x-1).(x+2)+x.(x-1)
7) (7x-3).(2x+1)-(5x-2).(x+4)-9x^2+17x
8) -2.(x-7).(x+3)+(5x-1).(x+4)-3x^2-27x
9) (6x-5).(x+8)-(3x-1).(2x+3)-9.(4x-3)
10) (8x-1).(x+7)-(x-2).(8x+5)-11.(6x+1).
một đòn bẫy dài một mét .đặt ở đâu để có thể dùng 3600n có thể nâng tảng đá nặng 120kg?
1.tim x
a) ( 17x-25):8+65=81
b) 720 :[41-(2x-5)]=8.5
c) 231-(x-6)=1339:13
\(a.\left(17x-25\right)\div8+65=81\)
\(\left(17x-25\right):8=81-65\)
\(\left(17x-25\right):8=16\)
\(17x-25=16\times8\)
\(17x-25=128\)
\(17x=128+25\)
\(17x=153\)
\(x=153\div17\)
\(x=9.\)
\(b.720\div\left[41-\left(2x-5\right)\right]=8\times5\)
\(720\div\left[41-\left(2x-5\right)\right]=40\)
\(\left[41-\left(2x-5\right)\right]=720\div40\)
\(\left[41-\left(2x-5\right)\right]=18\)
\(2x-5=41-18\)
\(2x-5=23\)
\(2x=23+5\)
\(2x=28\)
\(x=28\div2\)
\(x=14.\)
\(c.231-\left(x-6\right)=1339\div13\)
\(231-\left(x-6\right)=103\)
\(x-6=231-103\)
\(x-6=128\)
\(x=128+6\)
\(x=134.\)
a) => ( 17x-25 ) : 8 = 16 => ( 17x -25 ) = 128 => 17x = 103 = >x = 103/7