3x - ( 1 - x ) = - x + 5
3x - 1 + x = - x + 5
3x + x + x = 5 + 1
5x = 6
x = 6/5
Đúng 100%
3x - ( 1 - x ) = - x + 5
3x - 1 + x = - x + 5
3x + x + x = 5 + 1
5x = 6
x = 6/5
Đúng 100%
b1:
[4+2x]=-3x [3x-1]+2=x
[x+15]+1=3x [2x-5]+x=2
b2:
[2x-5]=x+1 [3x-2]-1=x
[3x-7]=2x+1 [2x-1]+1=x
Tìm x biết:
a,(-x+1)(x+3)+x(x-6)=11
b,(3x+1)(x-5)-3x(x-1)=5
2.Tìm x biết
a.|2x-5|=x+1
b.|3x-2|-1=2x
c.|x-5|+5=x
d.|3x-5|=3x-5
Tìm x
(15x-5) (4x-1) + (3x-7) (1-16x) =81
(2x+4) (x-4) +(x-5) (x-2) =3x+5 (x-4)
(8x-3) (3x+2) - (4x+7) (x+4) = (x+1) (5x-1)
tìm x biết
a, -5 (x^2 - 3x + 1 ) + x ( 1 +5x) = x-2
b,-4x ( x - 5 ) + 7x (x - 4 ) - 3x^ 2 = 12
các bạn ơi giúp mik với
a) (3x-5).(x+1)-(3x-1).(x+1)=x-4
b) (x-2).(x+3)-(x+4).(x-7)=5-x
c) 5.(x-3).(x-7)-(5x+1).(x-2)
d) 3.(x-7).(x+7)-(x-1).(3x+2)=13
tìm x
a) |x-2|+|x-5|=3
b) |3x-5|+|3x-1|=6
c) 2|x-3|+|2x+5|=11
d) |x+1|+|2x-3|=|3x-2|
e) |x-3|+|5-x|+2|x-4|=2
CẢM ƠN Ạ :)
1) Tìm x,biết :
a) 3/2 . |x-5/3| - 4/5 = 4/3 . |x-5/3| + 1
b) 2.|3x +1| = 1/3 . |3x + 1| +5
c) 1/4 - 5/2 . | 3x - 1/5| = 2/3. |3x - 1/5| - 2/3
*Dạng 2: Đa thức BT1: Thực hiện phép tính a) 3x(x^2-5x+7) b) (x+4)(-x^2+6x+5) c) (3x-1)(3x+5)-7(x^2+2) d) (-5x^5 + 2x^4 - 1/3x^3): (-1/2x^3)
a) -5(x^2 - 3x +1 ) + x ( 1+5x ) =x-2
b) -4x (x-5) +7x (x-4) -3x^2 =12