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\frac{4x\left(2-x\right)}{2-x}-\frac{2x}{2-x}
To add or subtract expressions, expand them to make their denominators the same. Multiply 4x times \frac{2-x}{2-x}.
\frac{4x\left(2-x\right)-2x}{2-x}
Since \frac{4x\left(2-x\right)}{2-x} and \frac{2x}{2-x} have the same denominator, subtract them by subtracting their numerators.
\frac{8x-4x^{2}-2x}{2-x}
Do the multiplications in 4x\left(2-x\right)-2x.
\frac{6x-4x^{2}}{2-x}
Combine like terms in 8x-4x^{2}-2x.