Question 644550
To say that [x+7]<= 5 is the same as saying x is in the closed interval [A,B]
A where is: 
and where B is: 
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|x+7| <= 5 means -5<= x+7 <=5
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Subtracting 7 along the line you get:
-12 <= x <= -2
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So, A = -12 and B = -2
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Cheers,
Stan H.
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