December 2018 1 13 Report
Jika  x^{2} + xy + x = 14 dan  y^{2} + xy + y = 28 maka nilai x + y = . . . .

A. -9 atau 6
B. -7 atau 6
C. -6 atau 8
D. 6 atau 8
E. 8 atau 9

matdas
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