4. y+= y в. C. -y-4 D. y-4 с. А. 4y-2 4y-2 5. 4x2 + 4y2 = 36 A. - в. с. - D. 2 6. x2 + 3xy- y = 7 2x-3y -2х-3у А. 3x-1 2x+3y В. 3x-1 2x-3y С. 3x+1 D. 3x-1

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