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(6x+2x)+(Q+4)=8x+7
8x+Q+4=8x+7 di pindah kan ruas 8x ke kanan dan 4 ke kanan
Q=(8x-8x)+(7-4)
Q=3
maaf jika ada kesalahan
... -3 = 8x -8x
...-3 = 0
... = 0 + 3
.. += 3