Do \(\left|x-\frac{1}{2}\right|< 3\)
=> \(\left[\begin{array}{nghiempt}x-\frac{1}{2}< 3\\x-\frac{1}{2}>-3\end{array}\right.\)=> \(\left[\begin{array}{nghiempt}x< \frac{7}{2}\\x>-\frac{5}{2}\end{array}\right.\)
Vậy \(\left[\begin{array}{nghiempt}x< \frac{7}{2}\\x>-\frac{5}{2}\end{array}\right.\) thỏa mãn đề bài
Tìm x:
a) 2(x+3)-3(x-1)=10
b) x(x-1)+2(x-1)=0
1. Tìm x biết :
1/2. x + 3/5. ( x - 2 ) =3
Tìm x thuộc N
x + ( x + 1 ) + (x + 2 ) +......+( x + 30 ) = 1240
1+2+3+......+x = 210
Tìm x,y thuộc N
( x +1 ) . ( 2y -5 ) = 143
Tìm x,y thuộc N:
a) x + (x + 1) + (x + 2) + (x + 3) + ... + (x + 30) = 1240
b) 2 . |x - 1|2 - 3 = 5
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
Tìm x nguyên, biết
a, /x-5/=6
b, /x+3/=x-4
c, /x+1/+/x-1/=2
d, /x-2/-/x-3/=1
Tìm x
2^x + 2^x+1 + 2^x+2 + 2^x+3= 480
Tìm X :
a) 1 + 2 + 3 + ...... + X = 105
b) 1 + 2 + 3 + ....... + X = 210
Tìm x
1/2*x+2/3*x=4+x
Tìm x biết:
-2/5.x+4/5.x-1/2+3/5.x-1
