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Can somebody help me with this?​

Can somebody help me with this?​-example-1

2 Answers

2 votes
it should be 18, the opposite is 12 so:

(12+y)/2 = 15
12+y = 30
y = 30-12 = 18
answered
User Jack Krupansky
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4 votes

Answer:

Explanation:

its 12

answered
User David Houde
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