2.( x + 3 ) - 2. ( x - 3 ) = x
<=> 2x + 6 - 2x - 6 = x
( 2x - 2x ) + ( 6 + 6 ) = x
12 = x
=> x = 12
\(2.\left(x+3\right)-2.\left(x-3\right)=x\)
\(2x+6-2x+6=x\)
\(\left(2x-2x\right)+\left(6+6\right)\)
\(12=x\)
\(\Rightarrow x=12\)
2.( x + 3 ) - 2. ( x - 3 ) = x
<=> 2x + 6 - 2x - 6 = x
( 2x - 2x ) + ( 6 + 6 ) = x
12 = x
=> x = 12
\(2.\left(x+3\right)-2.\left(x-3\right)=x\)
\(2x+6-2x+6=x\)
\(\left(2x-2x\right)+\left(6+6\right)\)
\(12=x\)
\(\Rightarrow x=12\)
A = 1 + 1 x 2 + 1 x 2 x 3 + 1 x 2 x 3 x 4 + 1 x 2 x 3 x 4 x 5 + ........... + 1 x 2 x 3 x ....... x 100 .
ai giúp zới
Bài 1: Tìm x , biết:
1) x - 2 = -6 12) 3 . | x - 1 | - 5 = 7
2) -5 . x - ( -3 ) = 13 13) -12 . ( x - 5 ) + 7 . ( 3 - x ) = 5
3) 15 - ( x - 7 ) = -21 14) ( x - 2 ) . ( x + 4 ) = 0
4) 3 .x + 17 = 2 15) ( x - 2 ) . ( x + 15 ) = 0
5) 45 - ( x - 9 ) = -35 16) ( 7 - x ) . ( x + 19 ) = 0
6) ( -5 ) + x = 15 17) -5 < x < 1
7) 2 . x - ( -17 ) = 15 18) | x | < 3
8) | x - 2 | = 3 19) ( x - 3 ) . ( x - 5 ) < 0
9) | x - 3 | - 7 = 13 20) 2 . x2 - 3 = 29
10) 72 - 3 . | x + 1 | = 9 21) -6 . x - ( -7) = 25
11) 17 - ( 43 - | x | ) = 45 22) 46 =- ( x - 11 ) = -48
Tìm x (giải chi tiết)
a) x(x-1)=0
b) (x+2)(x-4)=0
c) x3. x2 = 28 : 23
d) 3x-3 - 32 = 2.32
Tìm x
6-2(x+4)=-4
6 chia hết x
2x-15:5=-7
231-(x-6)=1339:13
(x-12):6=3 - x^2-1=3
28-x^3=1
(x+2)^3=27
81-(x-5)^2=56
x^2=9
14 chia hết x +3
1) (6 x 5^2 -13x7) x2 - 2^3 x (7-3) ^2
2) [(95+ 5^2 :5) : 2^2 +180]-2^2 x 10^2
3) 2^4 : 2^3 + 5^3 : 5^2 x 2^4 -3 x 2^5
GIÚP MK VS NHÉ
A = 12/ 1 . 2 x 22/ 2 . 3 x 32/ 3 . 4 x 42/ 4 . 5
B= 22./ 1 . 3 x 32/ 2.4 x 42/ 3.5 x 52/ 4.6
Tìm x biết
a) x +(x + 1) + (x + 2) + .... + (x +30) = 620
b) 2+4+6+8+....+2x = 210
c) (x-1) +(x-2)+(x-3)+...+(x-20) = -610
d) (x-3)(2x-7) = 0
e) |3-x| = x-5
g) |5x-2| \(^{_{ }\le}\)13
h) x+|2-x|=6
t) \(3^x+3^{x+1}+3^{x+2}=1053\)
i) | x+1| +|x-2| = 3
Nhanh lên! Mình cần gấp. Nguyễn Huy Tú
- Giúp mk vs
Tìm x :
a , x/x + 3 = 2/5
b, ( x + 1/2 )2 - 1/3 = 1/9
c, ( x - 1/2 )3 + 1/4 = 3/8
d, 2x+3 = 32
e, 3x+2 + 3x = 90
tìm x thuộc Z
1/ x.(x+7)=0
2/ (x+12). (x-3)=0
3/ (-x +5).(3-x)=0
4/x.(2+x).(7-x)=0
5/(x-1).(x+2).(-x-3)=0
Tìm x , biết :
a) x - 3/4 = 2x + 1/2
b) 3 . ( x - 2 ) - 2 . ( x + 3 ) = 4
c ) / x - 3/2 / - 1/2 = -35 . ( 1/3 )6