Question

[Nguyễn Quang Duy]

(12/7 :x-0,5)(2/5.x-1/1/2)=0

giúp mik vs ạ

Answer 1

[Nguyễn Lê Phước Thịnh]

\(\left(\dfrac{12}{7}:x-0.5\right)\left(\dfrac{2}{5}x-1\dfrac{1}{2}\right)=0\)

=>\(\left[{}\begin{matrix}\dfrac{12}{7}:x-0,5=0\\\dfrac{2}{5}x-1\dfrac{1}{2}=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}\dfrac{12}{7}:x=0,5\\\dfrac{2}{5}x=\dfrac{3}{2}\end{matrix}\right.\)

=>\(\left[{}\begin{matrix}x=\dfrac{12}{7}:\dfrac{1}{2}=\dfrac{12}{7}\cdot2=\dfrac{24}{7}\\x=\dfrac{3}{2}:\dfrac{2}{5}=\dfrac{3}{2}\cdot\dfrac{5}{2}=\dfrac{15}{4}\end{matrix}\right.\)

Answer 2

[Trần Hà Phương]

=>12/7:x=1/5 hoặc 2/5x=5/2

=>x=12/7:1/5=60/7 hoặc x=5/2:2/5=25/4