\(\left|2-3x\right|-5=-1.\)
\(\Leftrightarrow\left|2-3x\right|=4.\)
\(\Leftrightarrow\left[{}\begin{matrix}2-3x=4.\\2-3x=-4.\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=\dfrac{-2}{3}.\\x=2.\end{matrix}\right.\)
Vậy \(x\in\left\{-\dfrac{2}{3};2\right\}.\)
1) Tìm x,biết :
a) 3/2 . |x-5/3| - 4/5 = 4/3 . |x-5/3| + 1
b) 2.|3x +1| = 1/3 . |3x + 1| +5
c) 1/4 - 5/2 . | 3x - 1/5| = 2/3. |3x - 1/5| - 2/3
Bài 2 Tìm x biết 1, (2x-2).(3x+1)-(3x-2).(2x-3)=5 2,(1-3x).(3x-5)-(2x-4)(2-3x)=x-6 3,(2x-1).(4x^2+2x+1)-(2x+1)(4x^2-2x+1)=5x+6 Giúp tớ với
b1:
[4+2x]=-3x [3x-1]+2=x
[x+15]+1=3x [2x-5]+x=2
b2:
[2x-5]=x+1 [3x-2]-1=x
[3x-7]=2x+1 [2x-1]+1=x
1/4 - 5/2 . | 3x - 1/5 | = 2/3 . | 3x - 1/5 | - 2/3
*Dạng 2: Đa thức BT1: Thực hiện phép tính a) 3x(x^2-5x+7) b) (x+4)(-x^2+6x+5) c) (3x-1)(3x+5)-7(x^2+2) d) (-5x^5 + 2x^4 - 1/3x^3): (-1/2x^3)
tìm x biết 1/4 - 5/2 x |3x - 1/5|=2/3 x |3x - 1/5|- 2/3
Tính :
a) 1/4 - 5/2 . | 3x - 1/5 | = 2/3 . | 3x - 1/5 | - 2/3
b) 71/2 - 5/3 . | x - 1/4 |= 61/2 - 1/3 . | x - 1/4 |
c) 2 . | 3x + 1 | = 1/3 . | 3x + 1 | + 5
2.Tìm x biết
a.|2x-5|=x+1
b.|3x-2|-1=2x
c.|x-5|+5=x
d.|3x-5|=3x-5
Tìm x biết
2(x - 3) + 5 = 3x - 1
2x(3x + 2) - 5 = 3( 2x^2 - 2x + 1)
(3x - 2)(2x - 3) + 5 = 5
giải chi tiết giùm mình
tìm x:|5(3x+1)|+|2(3x+1)|+|3x+1|=4
