\(\frac{3-x}{5}=\frac{9}{25}\)
\(\Rightarrow\left(3-x\right).25=9.5\)
\(75-25x=45\)
\(25x=75-45\)
\(25x=30\)
\(x=\frac{30}{25}\)
\(x=\frac{6}{5}\)
\(\frac{3-x}{5}=\frac{9}{25}\)
=> \(25\left(3-x\right)=9\cdot5\)
=> \(25\left(3-x\right)=45\)
=> \(75-25x=45\)
=> \(25x=75-45\)
=> \(25x=30\Rightarrow x=\frac{30}{25}=\frac{6}{5}=1,2\)