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2x +6 +3x -12 = 9
2x +3x = 9 -6 +12
5x = 15
x = 15/5
x = 3
Jadi, nilai x adalah 3.
Itu jawabannya.
5x = 9+12-6
5x = 15
x = 3
kalo belum ngerti tanya aja