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2.x - 12.x = 0
=> 2 - 12 . x = 0
=> - 10.x = 0
=> x = 0 : ( - 10 )
=> x = 0
????
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
( 1 + 3 + 5 + 7 + ... + 2003 + 2005 ) x ( 1212 x 27 - 2727 x 12 )
= ( 1 + 3 + 5 + 7 + ... + 2003 + 2005 ) x ( 32724 -32724 )
= ( 1 + 3 + 5 + 7 + ... + 2003 + 2005 ) x 0
= 0
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
7,5*x+x*3,5=39,93
(7,5+3,5)*x=39,93
11x=39,93
x=39,93/11
x=3,63. Vậy x=3,63
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) X x 15 - X: 0.1 =2
<=> X x 15 - X x \(\frac{1}{0.1}\)=2
<=> X x (15 - 1/0.1) =2
<=> X x 5 =2
<=> X = 2/5
b) X + X:2 = 0.36
X + X x 1/2 = 0.36
X x (1+1/2)=0.36
X x 1.5 = 0.36
X =6/25
a)X x 15 - X : 0,1 = 2
=> X x ( 15 - 10 ) = 2
=> X x 5 = 2
=> X = 2 : 5
=> X = 0,4
=> X x 5 = 2
=> X = 2 : 5
=> X = 0,4
b)x . 1 + x . 1/2 = 0,36
x (1 + 1/2) = 0,36
x . 3/2 = 0,36
x = 0,36 : 3/2
x = 6/25 = 0,24
Xx15-X:0,1=2
Xx15-Xx10=2
Xx(15-10)=2
Xx5=2
X=2:5
X=0,4
Vậy X=0,4.
a) x . 15 - x : 0,1 = 2
x . 15 - x . 10 = 2
x . ( 15 - 10 ) = 2
x . 5 = 2
x = 2 : 5
x = 0,4
b) x + x : 2 = 0,36
x . ( 1 + \(\frac{1}{2}\)) = 0,36
x . \(\frac{3}{2}\)= 0,36
x = 0,36 : \(\frac{3}{2}\)
x = 0,24