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OpenStudy (anonymous):
Use substitution to solve the following system of equations. d + e – f = 11 e = f + d + 5 f = 2e – 12 A.d = 4, e = 3, f = –4 B.d = 3, e = 4, f = –4 C.d = 4, e = 3, f = –4 D. d = –4, e = 4, f = 3
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