If fff\(x^2 - y^2 = 12\)/fff and x - y = 4, then x =【小站备考】

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Question 14 Selected one answer choice

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If

$x^2 - y^2 = 12$ and x - y = 4, then x =

A.1.5

B.2.5

C.3.5

D.4.5

E.5.5

我的答案：