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》 (4a+5b+2) + (2a-3b-3)
》 (6a+2b-1)
2)
》 (6a+7b-5) + (8a-2b+6)
》 14a+5b+1
3)
》 (8x-2y+7) + (2x-8y-7)
》 10x-10y (Bagi 10)
》 x-y
4)
》(7x-6y) + (4x-y+6)
》11x-7y+6
5)
》 (5x-6y+6) + (x-y)
》 6x-7y+6
Semoga membantu.. ^_^