Simplify \(\frac{12}{10}\) to \(\frac{6}{5}\).
\[\frac{6}{5}=\frac{z}{25}\]
Multiply both sides by \(25\).
\[\frac{6}{5}\times 25=z\]
Use this rule: \(\frac{a}{b} \times c=\frac{ac}{b}\).
\[\frac{6\times 25}{5}=z\]
Simplify \(6\times 25\) to \(150\).
\[\frac{150}{5}=z\]
Simplify \(\frac{150}{5}\) to \(30\).
\[30=z\]
Switch sides.
\[z=30\]
z=30
