\(\dfrac{x-25-124}{2015}\) + \(\dfrac{x-124-2015}{25}\) + \(\dfrac{x-2015-25}{124}\) = 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

\(\frac{x-28-124}{2011}+\frac{x-124-2011}{28}+\frac{x-2011-28}{124}\)\(=3\)

\(\Leftrightarrow\frac{x-152}{2011}+\frac{x-2135}{28}+\frac{x-2039}{124}=3\)\(\Leftrightarrow\left(\frac{x-152}{2011}-1\right)+\left(\frac{x-2135}{28}-1\right)+\left(\frac{x-2039}{124}-1\right)=3-1-1-1\)

\(\Leftrightarrow\frac{x-2163}{2011}+\frac{x-2163}{28}+\frac{x-2163}{124}=0\)

\(\Leftrightarrow\left(x-2163\right)\left(\frac{1}{2011}+\frac{1}{28}+\frac{1}{124}\right)=0\)

        Vì \(\left(\frac{1}{2011}+\frac{1}{28}+\frac{1}{124}\right)>0\)

  \(\Rightarrow x-2163=0\)

\(\Leftrightarrow x=2163\)

          Vậy \(x=2163\)

124 : x + 24 : x - 48: x = 25

( 124 + 24 - 48 ) : x = 25

100 : x = 25

x = 4

\(124\div x+24\div x-48\div x=25\)

\(\Leftrightarrow\left(124+24-48\right)\div x=25\)

\(\Leftrightarrow100\div x=25\)

\(\Leftrightarrow x=100\div25=4\)

124/x + 24/x - 48/x =25

=>(124 + 24 - 48)/x=25

=>100/x=25

=>x=4

x – 124 = 371

         x = 371 + 124

         x = 495

Giá trị của x là 495

1014 : ( 124 - x ) = 13

             124 - x  = 1014 : 13

             124 - x  = 78

                     x  = 124 - 78

                     x  =        46

1014:(124-x)=13

124-x=1014:13=78

x=124-78

x=46