Question

x+30%x=1,31

giúp nha

     

Answer 1

\(x+30\%x=1,31< =>x+0,3x=1,31\)

\(< =>1,3x=1,31=>x=\dfrac{1,31}{1,3}=\dfrac{131}{130}\)

Answer 2

\(x+30\%x=1.31\\\Leftrightarrow\left(1+0,3\right)x=1,31\\ \Leftrightarrow1,3x=1,31\\ \Rightarrow x=\dfrac{131}{130}\)

Answer 3

x= 131/130 

Answer 4

\(x+30\%x=1,31\) 

\(x.\left(1+\dfrac{3}{10}\right)=\dfrac{131}{100}\) 

       \(x.\dfrac{13}{10}=\dfrac{131}{100}\) 

              \(x=\dfrac{131}{100}:\dfrac{13}{10}\) 

              \(x=\dfrac{131}{130}\)