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\frac{2x-4}{x}-\frac{2x}{x}
To add or subtract expressions, expand them to make their denominators the same. Multiply 2 times \frac{x}{x}.
\frac{2x-4-2x}{x}
Since \frac{2x-4}{x} and \frac{2x}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{-4}{x}
Combine like terms in 2x-4-2x.
\frac{2x-4}{x}-\frac{2x}{x}
To add or subtract expressions, expand them to make their denominators the same. Multiply 2 times \frac{x}{x}.
\frac{2x-4-2x}{x}
Since \frac{2x-4}{x} and \frac{2x}{x} have the same denominator, subtract them by subtracting their numerators.
\frac{-4}{x}
Combine like terms in 2x-4-2x.