Question

Tìm X: 

a, X x 2013 - X = 2013 x 2011 + 2013 

ai nhanh mk tích

Answer 1

a, X x 2013 - X =2013 × 2011 + 2013

X × ( 2013 - 1 ) = 2013 × (2011 +1 )

X × 2012 = 2013 ×2012

X × 2012 =4050156

X=4050156:2012

X=2013

Vậy x=2013

Answer 2

X x 2013 - x = 2013 x 2011 + 2013

2013 x - x = 2013 x 2011 + 2013

2012x = 2013 x ( 2011 + 1 )

2012 x = 2013 x 2012

x = 2013

Answer 3

Tìm X: 

          a, X x 2013 - X = 2013 x 2011 + 2013 

              X x 2013 - X x 1 =  2013 x 2011 + 2013 x 1

              X x ( 2013 - 1 ) = 2013 x ( 2011 + 1 )

              X x 2012 = 2013 x 2012

\(\Leftrightarrow\)    X = 2013