Seudónimo
Seudónimo
01-08-2018
Mathematics
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Please help ASAP need answers thank you
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choixongdong
choixongdong
01-08-2018
Similar triangles
x/3 = (9+3)/x
x/3 = 12/x
x^2 = 3 * 12
x^2 = 36
x = 6
Answer
6
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