To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $y$ and $x$ is $xy$. Multiply $\frac{2y-1}{y}$ times $\frac{x}{x}$. Multiply $\frac{2x-1}{x}$ times $\frac{y}{y}$.
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of $y$ and $x$ is $xy$. Multiply $\frac{2y-1}{y}$ times $\frac{x}{x}$. Multiply $\frac{2x-1}{x}$ times $\frac{y}{y}$.
