\(x\times5,2+x\times4,8=25\\ \Rightarrow x\left(5,2+4,8\right)=25\\ \Rightarrow10x=25\\ \Rightarrow x=\dfrac{25}{10}=\dfrac{5}{2}\)
Vậy \(x=\dfrac{5}{2}\)
\(X\times\left(5,2+4,8\right)=25\)
\(X\times10=25\)
=> \(X=\dfrac{25}{10}=2,5\)
dễ thì tự suy nghĩ sẽ tốt hơn