April 2019 1 51 Report
Nilai x yang memenuhi sistem persamaan :

 3^{2(9x-y-2)} - 30 \cdot 3^{(9x-y-2)} + 81 = 0

dan

8x - y + 4 = 0

adalah ?

A. -7 atau -9
B. -7 atau 9
C. 7 atau 9
D. 9 atau -33
E. 9 atau 33
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