(2x - 7) - (x + 135) = 0
2x - 7 - x - 135 = 0
x = 135 + 7
x = 142
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tìm x biết:
(2x-7)-135=0
122+(37-3x)=0
Tìm x , biết:
a)2x - 1 = 7
b) 3(x+5) = 21
c) 20 - (3x - 1) = 15
d) (x - 135) - 120 = 0
Tìm x
x+7=135-(135 +89)
Tìm x
a, x/15 = 2/5
b, 3/x*7 = 27/135
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€Z :
a) -12 (x -5)+7 (3- x) = 5
b) (x - 2)(x + 4) = 0
c) (x - 2)(x + 15) = 0
d) (7-x)(x + 19) = 0
-5x- 16 = 40 + x
4x - 10 = 15 - x
- 12 ( x - 5 ) + 7 ( 3 - x ) = 5
( x - 2 ) . ( x + 15 ) = 0
( x - 2 ) . ( x2 - 1 ) = 0
( 7 - x ). | x + 19 | = 0
( x - 3 ) . ( x - 5 ) < 0
(Giúp mifh với )
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...
Đọc tiếp
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
13) -12( x - 5 ) + 7( 3 - x ) = 5
14) ( x - 2 ) . ( x + 4 ) = 0
15) ( x - 2 ) . ( x + 15 ) = 0
16) ( 7 - x ) . ( x + 19 ) = 0
17 ) -5 < x < 1
18) \(\left|x\right|\) < 3
19) ( x - 3 ) ( x - 5 ) < 0
20) 2x2 - 3 = 29