| 2x + 5 | + | x + 2 | + x − 4 = 0
=> 2x + 5 + x + 2 + x -4 =0
=> 2x + 5 + x + 2 + x = 0 + 4
=> 2x + 5 + x + 2 + x = 4
=> 2x + x + x + 5 + 2 =4
=> 2x + x + x + 5 = 4 - 2
=> 2x + x + x + 5 = 2
=> 2x + x + x = 2 - 5
=> 2x + x + x = -3
=> x(2+1+1) = -3
=> x . 4 = -3
=> x = (-3) . 4
=> x = -12
Tìm x biết
1) \(\left(2x+3\right)\left(x-4\right)+\left(x-5\right)\left(x-2\right)=\left(3x-5\right)\left(x-4\right)\)
2)\(\left(8x-3\right)\left(3x+2\right)-\left(4x+7\right)\left(x+4\right)=\left(2x+1\right)\left(5x+1\right)-33\)
3)\(6x\left(3x+5\right)-2x\left(9x-2\right)+\left(17-x\right)\left(x-1\right)+x\left(x-18\right)-17x^2=0\)
4)\(\left(x-1\right)\left(x+2\right)-\left(x-3\right)+5x-7=0\)
Giúp mình nha. Camon nhiều
Tìm x biết :
\(\left|2x-1\right|=\left|2x+3\right|\)
\(\left|x\right|+\left|x+2\right|=0\)
\( \left|x\left(x^2\right)-\frac{5}{4}\right|=x\)
tìm x,y biết
\(\left|2x-5\right|+\left|3y+1\right|=0\)
\(\left|3x-4\right|+\left|3y-5\right|=0\)
\(|16-|x||+\left|5y-2\right|=0\)
\(\left|2x-5\right|+\left|xy-3y+2\right|=0\)
Bài 1 : Tìm x biết :
a, \(\left|\frac{3}{2}x+\frac{1}{2}\right|=\left|4x-1\right|\)
b, \(\left|\frac{5}{4}x-\frac{7}{2}\right|-\left|\frac{5}{8}x+\frac{3}{5}\right|=0\)
c,\(\left|\frac{7}{5}x+\frac{2}{3}\right|=\left|\frac{4}{3}x-\frac{1}{4}\right|\)
Bài 2 : Tìm x biết :
a, | 2x - 5 | = x +1
b, | 3x - 2 | -1 = x
c, | 3x - 7 | = 2x + 1
d, | 2x-1 | +1 = x
a) Tìm số tự nhiên n biết \(\left(n-1\right)^{n+11}-\left(n-1\right)^n=0\)
b) Tìm x biết: \(3\left(x-2\right)-4\left(2x+1\right)-5\left(2x+3\right)=50\)
c) Tìm x biết: \(\left|2x-3\right|=\left|2-x\right|\)
Cho biểu thức: A=\(\left(x-4\right)^{\left(x-5\right)^{\left(x-6\right)^{\left(x+6\right)^{\left(x+5\right)}}}}\)
Tính giá trị của biểu thức A, biết x=7 (Lưu ý: không tính trực tiếp bằng máy tính cầm tay)
Tìm x biết
\(x\left(x+1\right)=0\)
\(3x\left(2x-1\right)=0\)
\(\left(x+1\right)\cdot\left(x-2\right)=0\)
\(x^2\cdot\left(x+4\right)=0\)
\(\left(x+1\right)^2\cdot\left(3x-5\right)=0\)
\(x^2+1=0\)
\(3x^2\cdot\left(2x-5\right)^2=0\)
\(1\cdot2\cdot3\cdot.....\cdot100x=0\)
\(\left(\frac{3}{4}\right)^x=1\)
\(\left(\frac{2}{5}\right)^{x+1}=\frac{8}{125}\)
Tìm x biết:
\(a.\left|2x-3\right|=x-2\\ b.\left(2x+3\right)^6-\left(2x+3\right)^4=0\)
Tìm x và y biết:
d)\(-1\frac{2}{3}-\left(\left|2x\right|+\frac{5}{6}\right)=\)\(-2\)e)\(\left(-\frac{1}{2}+\frac{1}{3}\right):\left|1-2x\right|-1\frac{1}{4}:\left(-\frac{5}{8}\right).\left(-\frac{1}{2}\right)^2=\frac{1}{3}\)
c)\(\left|2x-1\right|+\left|2y+1\right|+\left|2x-y\right|=0\)b)\(\left|2x-1\right|=2x-1\)
a)\(\left|x-3\right|=x+4\)
