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3x - 5x = 20 - 6
-2x = 14
x = -7
Jika x = -7
x + 12
-7 + 12
5
Semoga membantu
Salam, Adrian
3x - 5x = 20 - 6
-2x = 14
x = -7
nilai x + 12 = -7 + 12
= 5