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\(\dfrac{x-25-124}{2015}\) + \(\dfrac{x-124-2015}{25}\) + \(\dfrac{x-2015-25}{124}\) = 3
\(\dfrac{x-15-124}{2015}\) - 1 + \(\dfrac{x-124-2015}{25}\) - 1 + \(\dfrac{x-2015-25}{124}\) - 1 = 0
\(\dfrac{x-15-124-2015}{2015}\)+\(\dfrac{x-124-2015-25}{25}\)+\(\dfrac{x-2015-25-124}{124}\) = 0
\(\dfrac{x-\left(15+124+2015\right)}{2015}\)+\(\dfrac{x-\left(124+2015+25\right)}{25}\)+\(\dfrac{x-\left(2015+25+124\right)}{124}\) = 0
(\(x\) - 2164).(\(\dfrac{1}{2015}\)+\(\dfrac{1}{25}\)+\(\dfrac{1}{124}\)) = 0
\(x-2164\) = 0
\(x\) = 2164
khoan cach giua 2 so la :2-1=1
co tat ca so so hang hay x la :(10-1):1+1=10
(x+1)+(x+2)+.....................(x+10)=2015
x*10+[(1+10)*10/2]=2015
x*10+55 =2015
x*10 =2015-55
x*10 =1960
x =1960/10
x =196
Ta có: 1000 . 0,1 < x < 10,9 : 0,1
100 < x < 109
=> x E { 101; 102 ; 103; 104; 105; 106 ; 107; 108 }
- HokTot -
( 2015 - x ) : 29 + 32 = 100
( 2015 - x ) : 29 = 100 - 32
( 2015 - x ) : 29 = 68
2015 - x = 68 x 29
2015 - x = 1972
x = 2015 - 1972
x = 43
L i k e nha các bạn !!!
(2015-x):26=100-32
(2015-x):26=68
2015-x=68x26
2015-x=1768
x=2015-1768
x=247
\(\frac{3+5+7+...+2015}{2+4+6+...+2014}+x=1\)
\(\frac{\left(3+2015\right).\left[\left(2015-3\right):2+1\right]:2}{\left(2+2014\right).\left[\left(2014-2\right):2+1\right]:2}+x=1\)
\(\frac{1016063}{1015056}+x=1\)
\(x=1-\frac{1016063}{1015056}\)
\(x=-\frac{1}{1008}\)
x < 1 /1000 => x = 0
x > 9.999 => x = 10 ; x = 11 .......
x > 197/100000 => x = 1 ; x = 2 ......
Chắc vậy đó.
1000+3,64×x+6,36×x=2015
3,64×x+6,36×x=2015-1000
3,64×x+6,36×x=1015
x×(3,64+6,36)=1015
x×10=1015
x=1015:10
x=101,5
vậy x=101,5