To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $4$ and $2$ is $4$. Multiply $\frac{x-3}{2}$ times $\frac{2}{2}$.
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $3$ and $4$ is $12$. Multiply $\frac{x-2}{3}$ times $\frac{4}{4}$. Multiply $\frac{9-2x}{4}$ times $\frac{3}{3}$.
