1.

What is the simplest form of \[1-[1-1-(1-1+x)]?\]

A. \[2-x\]                 
B.           \[~1\text{ }+\text{ }x\]                                
C.           \[~1-x\]                               
D.           \[2+x\]                
Answer» C.           \[~1-x\]                               


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