When solving absolute value equations, always check both potential solutions in the original equation because extraneous solutions may appear that do not actually satisfy the equation.
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This SAT problem looks easy until you check your work #digitalsat #satprep追加:
Before you go, here are three traps the SAT loves to set with absolute value questions.
First, extraneous solutions. Sometimes when you solve, one of your answers doesn't actually work when you plug it back in. Always check both solutions in the original equation.
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