x + x : 0,5 + x : 0,25 + x : 0,125 = 15
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X : (1 + 0,5 + 0,25 + 0,125) = 15
X : 1,875 = 15
X = 15 x 1,875
X = 28,125
x+x:0.5+x:0,25+x:0,125=15
x+(x:0,5+x:0,25+x:0,125)=15
x+x:(0,5+0,25+0.125)=15
x+x:0,875=15
x+x=15.0,875
x+x=13125
2x=13125
x=13125:2
x=6,562.5
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x + x : 0,5 + x : 0,25 + x : 0,125 = 15
X + X : \(\frac{1}{2}\)+ X : \(\frac{1}{4}\)+ X :\(\frac{1}{8}\)= 15
X + X x 2 + X x 4 + X x8 =15
X x (1+2+4+8) = 15
X x 15 = 15
x = 15 : 15
x =1
Tk mình nha!!
~Shizadon~
X + X : 0,5 + X : 0,25 + X : 0,125 = 15
X x 1 + X x 2 + X x 4 + X x 8 = 15
X x [ 1 + 2 + 4 + 8 ] = 15
X x 15 = 15
=> X = 15 : 15 = 1
![](https://rs.olm.vn/images/avt/0.png?1311)
x + x = 15
2 * x = 15
x = 7,5
0,5 + x : 0,25 + x : 0,125 = 15
0,5 + x * 4 + x* 8 = 15
x * ( 4 + 8) = 14,5
x * 12 = 14,5
x = 29/24
![](https://rs.olm.vn/images/avt/0.png?1311)
x+x:0,5+x:0,25+x:0,125=15
(=)\(x+x.2+x.4+x.8=15\)
(=)x.(1+2+4+8)=15
(=)x.15=15
(=)x=1
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
x + x : 0, 5 + x : 0, 25 + x : 0, 125 = 15
x + x . 2 + x . 4 + x . 8 = 15
x( 1 + 2 + 4 + 8 ) = 15
x . 15 = 15
x = 1
x=1
k mk nha!!!