\(\left(8\dfrac{4}{5}x-50\right):40\%=51\)
\(\left(\dfrac{44}{5}x-50\right):\dfrac{2}{5}=51\)
\(\dfrac{44}{5}x-50=51\cdot\dfrac{2}{5}\)
\(\dfrac{44}{5}x-50=\dfrac{102}{5}\)
\(\dfrac{44}{5}x=\dfrac{102}{5}+50\)
\(\dfrac{44}{5}x=\dfrac{352}{5}\)
\(x=\dfrac{352}{5}:\dfrac{44}{5}\)
\(x=8\)
Vậy \(x=8\).
Đúng 1
Bình luận (1)
\(\left(\dfrac{84}{5x-50}\right):40\%=51\)
\(\dfrac{84}{5x-50}\)\(=51.40%\)%
\(\dfrac{84}{5x-50}\)=\(20,4\)
\(84=20,4(5x-50)\)
\(84=102x-1020\)
\(102x=84+1020\)
\(102x=1104\)
\(x=1104:102\)
\(\dfrac{184}{17}\)
Đúng 0
Bình luận (0)
