Rút gọn biểu thức P= |3x-6|-3x+5. Với x≥2 Q=|8-2x|+3x+8. Với x≥4 R= 4x+5-4|x+5|. Với x≤5
1, 3/x-7/-12/4x+8/=3x-8
2, -5/x-7/+3/3-x/=12x-8
3, /x-7/ -/3x-5/=0
a) |2x-5|=|3x-8| b) |x+5|=|3x-2| c) |2/5-x/4|=|3-x|
Tìm x:
| 7 - 4x | - |3x- x | =8
|3x + 5 |>=3
| 6+3x |+| 8 -x |=0
Tìm x
a) 6x(5x + 3) + 3x(1 – 10x) = 7 b) (3x – 3)(5 – 21x) + (7x + 4)(9x – 5) = 44
c) (x + 1)(x + 2)(x + 5) – x2(x + 8) = 27
d) 5x(12x + 7) – 3x(20x – 5) = - 100
e) 0,6x(x – 0,5) – 0,3x(2x + 1,3) = 0,138
Tìm x :
a) | x +5 | + | 3 - x | = 8
b) | 3x - 5 | + | 3x +1 | = 6
c) | x - 3 | + | 2x + 5 | = 11
d) | x +1 | + | 2x - 3 | = | 3x - 2 |
e) | x - 3 | + | 5 - x | + 2|x-4| = 2
(-75):(x+6)=-15
B) -25-5×(x+2)=50
D, 6×(2x-8)-8×(3x-5)=-56
1, Tìm x
a,3x.(2x+3)-(2x+5).(3x-2)=8
b,5x(x+2)-x.(2x-7)-3x^2=81
tim x biết ( 2,5 -3x ) : 5/3=( 8/5+2x ) : -8/17