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3|x-1| >= 12

A. X>= -3 or x<= 5
B.X<= -3 or x>= 5
C. X>= 5
D. X<= -3 or x>=5

User Cristallo
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3|x-1| ≥ 12

|x-1| ≥ 4. Remove the absolute signs:

x - 1 ≥ 4 → x≥ 5
and x-1 ≤ -4 → x≤ - 3

Then D. x ≤ -3 or x ≥ 5

User Shengbinmeng
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