Solve the proportion. \[ \begin{array}{l}\frac{14}{10}=\frac{y+9}{15} \\ y=[?]\end{array} \]

Solve the equation \( \frac{14}{10}=\frac{y+9}{15} \). Solve the equation by following steps: - step0: Solve for \(y\): \(\frac{14}{10}=\frac{y+9}{15}\) - step1: Reduce the fraction: \(\frac{7}{5}=\frac{y+9}{15}\) - step2: Swap the sides: \(\frac{y+9}{15}=\frac{7}{5}\) - step3: Multiply both sides of the equation by \(15:\) \(\frac{y+9}{15}\times 15=\frac{7}{5}\times 15\) - step4: Multiply the terms: \(y+9=\frac{7\times 15}{5}\) - step5: Evaluate: \(y+9=21\) - step6: Move the constant to the right side: \(y=21-9\) - step7: Subtract the numbers: \(y=12\) The solution to the proportion is \( y = 12 \).