\(2\times3^{x+1}+3^{x+2}=135\)
\(3^{x+1}\left(2+3\right)=135\)
\(3^{x+1}\times5=135\)
\(3^{x+1}=\frac{135}{5}\)
\(3^{x+1}=27\)
\(3^{x+1}=3^3\)
x + 1 = 3
x = 3 - 1
x = 2
Tìm x biết :
a)3x+1.15=135
b)x+2.x+22.x+23.x+...+22016.x=22017-1
c)x.(x-1)+(x-1)2=0
d)4.32\(\le\)2x-5\(\le\)1024(x ϵ N)
Bài 1 : Tính hợp lí
A=48+(-48-174)+\(|-74|\)
B=(-123)+77+(-257)-23-43
C=(-57)+(-159)+47+169
D=(135-35).(-47)+53.(-48-52)
Bài 2: tìm \(x\in\)Z biết
a)2(x+1)=0
b)x(x-2)=0
c) (x-1)(x+7)=0
d) (x+2)(x2 -9)=0
e) x2 (x-5)+2(x-5)=0
Bài 3 : tìm x,y \(\in\)Z biết
(x-3)(y+2)=7
Tìm x
a) 304/60 = 9/135-x
b) -1/2 + 16/124 + x -5/31=2/62
2/17 + 15/24 - 15/27 - x - 8/23 = 0
a) 135 + (-2) . 14 -135 + 28
b) -18 . 2 +18 . (-6) + (-18) . 3
a) 135 + (-2) . 14 - 135 +28
b) -18 . 2 + 18 . (-6) + (-18) . 3
Tìm x biết 2*(x-1) +(-2)^3*(x-2)=(-2017)^0*(-2)^3*(x+3)
b) -(2x=1)-[(-3)^2-1]*(2x=1)=3-2*(1-2x)+7*(-4)
m.-5(x+1/5)-1/2(x-2/3)=3/2x-5/6
n.3(x-1/2)-5(x+3/5)=-x+1/5
Bài2:Tìm x biết
a.1/3+2/3:x=-7
b.1/3x+2/5(x-1)=0
c.(2x-3)(6-2x)=0
d.x:3/4+1/4=-2/3
e.-2/3-1/3(2x-5)=3/2
f.2 l1/2x-1/3l-3/2=1/4
g.3/4-2.l2x-2/3l=2
h.(-0,6x-1/2).3/4-(-1)=1/3
i.(3x-1)(-1/2x+5)=0
j.1/4+1/3:(2x-1)=-5
k.(2x+3/5)2-9/25=0
l.3(3x-1/2)3+1/9=0
m.-5(x+1/5)-1/2(x-2/3)=3/2x-5/6
n.3(x-1/2)-5(x+3/5)=-x+1/5
Tìm X:
a) 1/3 X + 2/5 (X - 1)=0
b) 1/2|X|+1/2=5/2
c) -2/3-1/3(2X-5)=3/2
d) (3X-1)(1/2X+5)=0
đ) 3 và 1/3+5/6X=3 và 1/2
