(3x+5y+7z)+(4x-6y-6z) By Admin ReiPosted on December 1, 2022 (3x+5y+7z)+(4x-6y-6z) Jawaban Terkonfirmasi (3x+5y+7z)+(4x-6y-6z)= 3x + 4x + 5y – 6y + 7z – 6z= 7x – y + z.