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3n - 2n = -1 - 2
n = -3
2) 7n - 5 = 5n + 9
7n - 5n = 9 + 5
2n = 14
n = 14/2
n = 7
3n -2n = -1 -2
n = -3
Jadi, himpunan penyelesaiannya adalah {-3}.
2. 7n -5 = 5n +9
7n -5n = 9 +5
2n = 14
n = 14/2
n = 7
Jadi, himpunan penyelesaiannya adalah {7}.
Itu jawabannya.