Bunuel wrote:
The sum of all solutions for x in the equation x^2 – 8x + 21 = |x – 4|+ 5 is equal to:
(A) –7
(B) 7
(C) 10
(D) 12
(E) 14
Kudos for a correct solution.
Two basic ways to write out absolute values for the GMAT
l x -4 l
x - 4 =
- l x -4 l =
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