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b.-2x+y+7z
c.14x2-6x-4
(operasikan semua yang sukunya sama)
b. 6× - 5y -2z + (-8×) + 6y + 9z = -2× + y +7z
c. 3(2ײ - 4× + 5) + 2(4ײ + 3× - 7) = 6ײ - 12× + 15 + 8ײ + 6× - 12= 14ײ - 6× + 1