Question

1,Tìm x

118,24 - ( x : 5 + x . 3 ) = 27,12 .  2

 

Answer 1

\(118,24-\left(x:5+x.3\right)=27,12.2\)

\(\Leftrightarrow118,24-\left(x:5+x.3\right)=54,24\)

\(\Leftrightarrow x:5+x.3=118,24-54,24\)

\(\Leftrightarrow x.\frac{1}{5}+x.3=64\)

\(\Leftrightarrow x.\left(\frac{1}{5}+3\right)=64\)

\(\Leftrightarrow x.\frac{16}{5}=64\)

\(\Leftrightarrow x=64:\frac{16}{5}\)

\(\Leftrightarrow x=20\)