(2x+7)+135=0
2x+7 =0-135
2x+7 =-135
2x = -135-7
2x =-142
x =-142:2
x =-71
( 2x + 7 ) + 135 = 0
2x + 7 = 0 - 135
2x + 7 = -135
2x = -135 - 7
2x = -142
x = -142 : 2
x = -71
\(\left(2x-3\right)\left(6-2x\right)=0\)
Bài 1 Tìm x ,y biết
a, 2| 2x -3 | =1
b,7,5 -3 | 5 -2x | = -4,5
c, | 3x-4 | + | 3y +5 |=0
Bài 2 Tìm x biết
a, \(\left|\frac{5}{3}x\right|\) =\(\left|-\frac{1}{6}\right|\)
b, \(\left|\frac{3}{4}x-\frac{3}{4}\right|-\frac{3}{4}=\left|-\frac{3}{4}\right|\)
c, \(\left|x+\frac{3}{5}\right|-\left|x-\frac{7}{3}\right|=0\)
Bài 3 Tìm x biết
a,| x |+| x+2 |=0
b,\(\left|x\left(x^2-\frac{5}{4}\right)\right|=x\)
Giá trị x < 0 thỏa mãn :
\(\left|2x-\dfrac{1}{2}\right|+\dfrac{3}{7}=5\dfrac{3}{7}\)
\(\left(x-1\right)⋮\left(x+5\right)\)
\(\left(4x-3\right)⋮\left(2x-1\right)\)
\(\left|4x+12\right|+\left|18-3y\right|=0\)
Tìm x trong các đẳng thức:
a) \(\left|2x-3\right|=5\)
b) \(\left|2x-1\right|=\left|2x+3\right|\)
c) \(\left|x-1\right|+3x=1\)
d) \(\left|5x-3\right|-x=7\)
u, \(\left|x-2\right|=0\)
v. \(\left|x-5\right|=7-\left(-3\right)\)
w. \(\left|x-5\right|=\left|-7\right|\)
\(\left(x^3+9\right)\left(x^3+5\right)\left(x^3-3\right)\left(x^3-7\right)< 0\)
1. Tìm x, biết:
a) \(\frac{2}{5}x-x=\frac{\left(-2018\right)^0}{5^2}\)
b) \(\left|-1\frac{1}{2}x+2x\right|-\frac{7}{4}=0,5\)
c) x + \(\left(x+\frac{2}{7}\right)+\frac{-5}{11}=\frac{4}{11}\)
d) |0,25x - 20o/o| \(+\frac{3}{8}=1\frac{3}{8}\)
Tìm \(x\) :
\(37+\left(13-\left|2x+7\right|\right)=6^{30}:\left(9^{14}.4^{15}\right)\)
