Tìm x:
1) -3.(1-2x) - 4.(1+3x) = -5x + 5
2) 3.(2x - 5) - 6.(1 - 4x) = -3x + 7
3) (1 - 3x) - 2.(3x - 6) = -4x - 5
4) x.(4x - 3) - 2x.(2x - 1) = 5x - 7
5) 3x.(2x - 1) - 6x.(x + 2) = -3x + 4
6) (1 - 2x).3 - 4.(6x - 1) = 7x - 5
7) 6x - 3.(1 - 4x) - 5.(x + 1) = 2x + 7
8) 6.(1 - 3x) - 3.(2x + 5) = -10x + 7
9) 3x.(1 - 2x) + 6x^2 - 7x = 8.(1 - 2x) - 9
10) 2x.(1 + 3x) - 3x.(4 + 2x) = 3x - 4
a,2^12.3^54^6.81/(2^2.3)^6+8^4.3^5
b, 4.(-1/2)^3-2.(-1/2)^2+3.(-1/2)+1
c, 5x-7=3x+9
d, 5x-|9-7x|=3
e, -5+|3x-1|+6=|-4|
g, (x-1)^2=(x-1)^4
h, 5^-1.25=125
i, |x+1|+|x+2|+|x+3|=4x
bai 1:Chuyen tong thanh tich a,\(x^2+5x+6\) b,\(2x^2+5x+3\)
c,\(x^2-10x+16\) d,\(4x^2+9x+5\)
bai 2 :a, \(A=x^2-3x\) b, \(B=\dfrac{x+1}{2+x}\) c, \(C=\dfrac{x-1}{x^2+5}\)
a , x+1/2=25:23
b , 2/3+5/3x=5/7
c , |x+5|-6=9
d , -12/13x-5=6 1/13
Cho \(\dfrac{3x-2y}{4}=\dfrac{4y-3z}{2}=\dfrac{2z-4x}{3}\) và \(x-2y+3z=8\)
Tìm x, y, z
1)a,\(\frac{x-7}{6}=\frac{2^3}{16}\)
b, (-0,75x) :3 = \(\left(-2\frac{1}{2}\right)\):0,125
c, \(\left(x-2019^{2020}\right)=1\)
d, \(\left|2,6-x\right|=1,5\)
e, \(\left|x\right|=2019\) và x < 0
2)a, \(\frac{x}{4}\)=\(\frac{y}{9}\) và x-yz=90
b,x:y=2:5 và x+y =-28
c,7x=2y và x-y=20
d,x=\(\frac{y}{2}\)=\(\frac{z}{3}\) và 4x-3y+2z=16
e,\(\frac{x}{y}=\frac{10}{9};\frac{x}{z}=\frac{3}{4}\) và x-y+z =78
tìm x biết
1)\(\left(1-2x\right)^2=9\)
2)\(\left(x+5\right)^3=-64\)
3)\(\left(3x-5\right)^2=16\)
4) \(\left(x-1\right)^3=27\)
5)\(x^2+x=0\)
6)\(5^{x+2}=625\)
7) \(5-\left|3x-1\right|=3\)
8) \(\left|2x-1\right|+5=4\)
9)\(\left|\dfrac{1}{3}-x\right|-1=\dfrac{2}{3}\)
a) Tính giá trị biểu thức sau:
\(\dfrac{9^4.8^6}{6^{10}.16^3}\)
b) Tìm x:
1/ \(\left(\dfrac{4}{5}x-1\right).\left(6x+\dfrac{1}{2}\right)=0\)
2/
\(\left(2x+1\right)^2=25\)
3/
x:8,5=0,69:(-1,15)
4/
3(3x+5)-2(6-2x)=10
5/
\(\sqrt{x}=2,5\)
6/
\(3^{X-1}+5.3^{x-1}=162\)
7/
\(\dfrac{X-5}{1}+\dfrac{X-5}{2}+\dfrac{X-5}{3}+\dfrac{X-5}{4}=0\)
tìm x
a, \(1\dfrac{2}{3}x-\dfrac{1}{4}=\dfrac{5}{6}\)
b, \(\dfrac{x}{-4}=\dfrac{-48}{3x}\)
c, \(3^{2.x+1}=81\)