LON-CAPA arith_abs001.problem

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$\textrm{If}\ |{-}x\ +\ 6|\ -\ 2\ =\ 7,\ \textrm{then}\ x\ \textrm{= ?}$

$-3$

$-3\ \textrm{or}\ 15$

$-15$

$3\ \textrm{or}\ -15$

$15$

$\textrm{None of the above}$

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