Difference between revisions of "2010 AMC 10B Problems/Problem 13"
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− | Since an absolute value cannot be negative, we exclude <math>x=-60</math>. The answer is <math>20+60+12= </math>\boxed{\mathrm {(C)} | + | Since an absolute value cannot be negative, we exclude <math>x=-60</math>. The answer is <math>20+60+12= </math>\boxed{\mathrm {(C)} 92}$ |
Revision as of 20:17, 24 January 2011
Problem
What is the sum of all the solutions of ?
Solution
Case 1:
Case 1a:
Case 1b:
Case 2:
Case 2a:
Case 2b:
Since an absolute value cannot be negative, we exclude . The answer is \boxed{\mathrm {(C)} 92}$