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1978 AMC 12 Question 9

AMC12 · 1978 AMC 12

Question 9

If $x\lt0,$ then $\left|x-\sqrt{(x-1)^2}\right|$ equals
  1. $1$
  2. $1-2x$
  3. $-2x-1$
  4. $1+2x$
  5. $2x-1$