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4x-4-2\left(2x-2\right)
Use the distributive property to multiply 4 by x-1.
4x-4-4x+4
Use the distributive property to multiply -2 by 2x-2.
-4+4
Combine 4x and -4x to get 0.
0
Add -4 and 4 to get 0.
4\left(x-1-\left(x-1\right)\right)
Factor out 4.
0
Simplify.
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