Ta có: x-3+1< 10+5+7
=> x-3+1< 22
=> x-2< 22
=> x< 24
b) 3x+5 > 3x+1
3x= 3x; 5>1 => 3x+5 > 3x+1 với mọi giá trị x
c) 2x+1-2> x+3+5
=> 2x-1> x+8
=> x>9
d) 4(x+1)>0
=> (x+1) >0
=> x> -1
tìm X
1/4+2.(3.x-2/3)=1
(1/2+2X). (2x-3)=0
(4x-5).(5/4.x-2)=0
1/9-(2.x+1/2)mũ 2=0
9.(3x-1/2)mũ 2 =4
1/2.x+2/3.x-1=-10/3
X+1/12=-3/9
Tìm x
a) 1/3x + 2/5( x - 1 ) = 0
b) (2x - 3 )(6 - 2x ) =0
c) 2|1/2x - 1/3 | - 3/2 = 1/4
d) 3/4 - 2 . | 2x - 2/3 | = 2
e) ( 3x - 1)(-1/2x + 5 ) = 0
g)-5(x + 1/5 ) - 1/2(x - 2/3 ) = 2/3x - 5/6
h) 3(x - 1/2 ) - 5(x + 3/5 ) = -3 + 1/5
i) 60%x + 2/3x = 1/3. 6và1/3 ( 6và1/3 là hỗn số )
Tìm x, biết:
1) 14x - 5 = 8x + 10
2) 15 + 5x = 3x + 30
3) 2x - 5 = 15- 3x
4) 2 ( 3x + 5 ) + 3 ( x + 1 ) = 6x + 20
5) 4 ( x - 3 0 + 5 ( x - 3 ) = 18
Tìm x thuộc z để bt sau có giá trị nguyên
1)2x^2+3x+1
2)3x-5/2
3)-6/3x+2
4)3x-5/3x-10
5)5x-3/x+1
Bài 3 tìm x để bt
a)2x(x+1)>0
b)(x-2)(x+3)<0
Nhanh giúp mình vs thank
a) -3000 : 2 + 5(2x-1) = 125
b) 6x -12 = -18
c) 17 + 3(x-1) = 5
d) (x-5) (3x-6) = 0
tìm x thuộc z
1)(-3x+2)-(5-3x)=-3
2) 3+x-(3x-1)=6-2x
3) (x-5).(3x+4)=0
4) 7x.(2x-1)=0
5) (3x-1).2x=0
giúp mik với mai mik đi học rùi :((
tìm x biết:
(3x-1) [- 1/2x+5]=0
1/4+1/3:(2x-1)=-5
[2x+3/5]2 - 9/25=0
-5(x+1/5)-1/2(x-2/3)=3/2x - 5 /6
[x+1/2]x [2/3-2x]=0
17/2-|2x-3/4|=-7/4
2/3x-1/2x =5/12
(x+1/5)2+17/25=26/25
[x.44/7+3/7].11/5-3/7=-2
3[3x-1/2]+1/9=0
1.Tìm x:
a) 4x - 3x +1= 5
b) (2x - 4) . 3x = 0
c) x . (x-1) - (x-1)= 0
2.Tìm x:
a) 7 . (x - 1) = 6x + 3
b) 8 . ( 2x - 3) -15x = 4
c) 7 . 10 + (x -1) . 2 = 100
a) x + 7 ⋮ x + 2
b) 2x + 5 ⋮ x + 1
c) 3x - 2 ⋮ x + 3
d) 12x + 1 ⋮ 3x + 2
e) x2 + 3x + 5 ⋮ x + 3
f) X2 - 2x + 3 ⋮ x + 2
