\(\left|3x+2\right|-2-3x=0\)
\(\left|3x+2\right|=3x+2\)
\(\Rightarrow\left[{}\begin{matrix}3x+2=3x+2\\3x+2=-3x-2\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}\text{luôn đúng}\\6x=-4\end{matrix}\right.\)
\(\Rightarrow\left[{}\begin{matrix}\text{luôn đúng}\\x=\dfrac{-2}{3}\end{matrix}\right.\)
Tìm cặp xy thỏa mãn x\(^2\)+2y-2+3x=0
Tìm x,y thuộc Z biết
a.(x-1).(2y-4)=0
b.(3x-2).(y-3)=6
c.(3x-4).(2y-1)=2
d.2xy-3x-2y+8=0
Bài 1: Tìm x biết :
a) (x+2)^2 - (3x-7)^2=0
b) (4x+1) -(5x-3)^2=0
c) 25(x-3)^2 - 49(2x+1)^2=0
d) 9(3x-2)^2=121(1-4x)^2
e) (x-5/4)^2=(5x+1/2)^2
Bài 5.Tìm x N, sao cho:
a)3636 : (12x –91) = 36
b)(x : 23 + 45) . 67 = 8911
c)[(6x –39) : 7]. 4 = 12
d)(3x –24). 73= 2. 74
e)x(x –10) = 0
f)(x+ 1). (x –2) = 0
g)(9 –x)3= 64
h)3x= 81
i)2 . 3x= 10 . 312+ 8 . 312
j)(19x + 2.52) : 14 = (13 -8)2-42
Tìm x : (x > 0)
x^2 + (2x)^2 + (3x)^2 + (4x)^2 + (5x)^2 = 220
1. 6 X mũ 3 -8 =40
2. 4 X mũ 5 +15=47
3. 2 X mũ 3-4=12
4. 5 X mũ 3-5=0
5. (X -5) mũ 2016 = (X-5) mũ 2018
6. (3X -2) mũ 20= (3X-1) mũ 20
7. (3X -1) mũ 10 = (3X-1) mũ 20
8. (2X -1) mũ 50 = 2X-1
9. (X phần 3 -5) mũ 2000= ( X phần 3-5) mũ 2008
x^4+2x^3-3x^2-8x-4=0
Tìm 3x mũ 2 nhân y-x+xy=6
2,tìm x,y,z,biết:
a,3x+4y-xy=16
b,3.(x-1)+2.(y-3)2+(z+2)2=0
c,x2+(x-1)2=0
