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