Question

determine AB, sendo M ponto médio de AB

Answer 1

(12 + x)/2 = 2x + 5

12 + x = 4x + 10

4x - x = 12 - 10

3x = 2

x = 2/3
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AB = 12 + x

AB = 12 + 2/3

AB = (3 . 12 + 2)/3

AB = (36 + 2)/3

AB = 38/3