Hey!
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Answer:
w = -12 or w = 12
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Step-by-step explanation:
The lines on each side of the w stands for "absolute value". This means that whatever number is inside the two lines is positive regarding its sign.
|12| = 12
|-12| = 12
Since the equation has the negative symbol outside the two lines, it means that the absolute value will remain negative.
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Hope This Helped! Good Luck!