Question

   Tìm x, biết:

  x+x :5=12,6

Answer 1

x:1+x:5=12,6

x:(1+5)=12,6

x:6=12,6

x=12,6×6

x=75,6

vậy x=75,6

Answer 2

(x+x):5=12,6 x×2:5=12,6 x×2=12,6×5 x×2=63 x =63:2 x =31,5

Answer 3

::::::::::::::::::::::::::::::::::::::::::::::::::::::>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Answer 4

cho rằng x=x

x+x:5=12,6

x       =12,6 * 5

x       =63 :2

x        = 31,5

    mk lớp 4 có sai thì thông cảm cho mk

Answer 5

Bài làm:

Ta có: \(x+\frac{x}{5}=12,6\)

\(\Leftrightarrow\frac{6}{5}x=\frac{63}{5}\)

\(\Leftrightarrow x=\frac{63}{5}\div\frac{6}{5}\)

\(\Rightarrow x=\frac{21}{2}\)

Sa