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JAMB - Mathematics (2013 - No. 15)

Solve for x: |x - 2| < 3
x < 5
-2 < x < 3
-1 < x < 5
x < 1

Explication

|x - 2| < 3 implies

-(x - 2) < 3 .... or .... +(x - 2) < 3

-x + 2 < 3 .... or .... x - 2 < 3

-x < 3 - 2 .... or .... x < 3 + 2

x > -1 .... or .... x < 5

combining the two inequalities results, we get;

-1 < x < 5

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