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2.= 2p + 7p + 2 - 2q = 9p + 2 - 2q
3.= 5 - 3 + x + 2x - 2y + y = 8 +3x - y
4.= -3 + 4 + x + 5x - 4y - 3y = 1 + 6x - 7y
Maaf kalo jawabannya salah bro :)