a) \(\left(2x-3\right)-\left(x-5\right)=\left(x+2\right)-\left(x-1\right)\)
\(2x-3-x+5=x+2-x+1\)
\(x-2=3\\ x=3+2\\ x=5\)
b) \(2\left(x-1\right)-5\left(x+2\right)=-10\)
\(2x-2-5x-10=-10\\ -3x-12=-10\\ -3x=-10+12\\ -3x=2\\ x=2:\left(-3\right)\\ x=-\dfrac{2}{3}\)
Tìm x Biết :
a , 2/3 +1/3: x = 3/5
b , (2x / 3 ) : ( - 10) = 2/5
c , I 2x -1I +1 =4
d , 8- I 1-3x I =3
e , (x+7) ^3 = -125
Bài 2: Tìm |x| biết
a) x = \(\dfrac{-3}{-11}\)
Bài 3: Tìm x biết
a) |4 (x-1)| = 12
b) |2x +1| - 5 = 10
c) |2,5 - x| - 1,3 = 0
d) -|1,4 - x| - 2 = 0
e) |x - 2| = x
f) 2|2x - 3| = \(\dfrac{1}{2}\)
a/ 4^(x-3)+4^(x-5)=68
b/ 1/3-1/3:|2x-1|=-2/3
c/ 2|x-1|-3|x+5|=0
d/( √x +7)^10 =1024*125^2*25^2
1, Tìm x, biết
a, 2|x+2|+|4-x|=11
b, |x+5|-|1-2x|=x
c, |x|-|2x+3|=x-1
Tìm x, biết
a) | x - 5 | - 2a = 3
b) | 2x -1 | + 3x = 1
c) | x - 5 | = 3x - 2
d) |9 - 7x| = 5x - 3
Tìm x biết
a) 3(1-4x).(x-1)+4(3x-2).(x+3)=-27
b) (x+3).(x2-3+9)-.(x-1).(x+1)=27
c) 2x2+3(x-1).(x+1)=5x.(x+1)
d) 8(x-1).(x+5)-(x+2).(x+5)=3(x-1).(x+2)
a) 2x-1/11+2x-2/12+2x-3/13=2x+5/5+2x+6/4+2x+7/3
b) x-1/2016+x-2/2015+x-3/2014+x-4/2013+x-5/2012 -5=0
c) x+2017/2+x+2015/3+x+2013/4+x+2011/5+8=0
bài 1: tìm nghiệm của các đa thức sau
a) A(x)=9.x+13
b) B(x)=x^2-49
c) C(x)=x^2-7
d) D(x)=2.x^2-32
e) E(x)=3.x^2-5
g) G(x)=x^2+6.x
m) M(x)=5.x^2-10.x
n) N(x)=x^3-9.x
p) P(x)=2x^3-10.x
q) Q(x)=x^3-4.x^2
f) F(x)=3.x^3-2.x^2
k) K(x)=x^2+7
h) H(x)=4.x^2+8
t) T(x)=(x-3)^2+5
l) L(x)=4.(x+1)^2+3
giúp mik với
a) |x-3|=|4-x|
b) |2x-1|+5=5
c) |x-1|(-1/2)^3=(-1 /2)^5
d) 3x-|2x+1|=2
e) |x|+|-x|=3-x
