AMC / AIME · Absolute Value · Hard

Absolute Value: math passes through math; its positive vertex is math. Find math.

Cases and graphs.

Try the problem

y=∣x−a∣y=|x-a| passes through (5,7)(5,7); its positive vertex is (a,0)(a,0). Find aa.

Hint and answer

Concept to use

Inequalities.

Hint

Split an absolute value by sign, or interpret it as distance.

Answer

12

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