Answer: 3x-4y-6z
Step-by-step explanation:
First collect the like terms and you get:-2x + 5x - 2y - 2y - 2z - 4zAdd similar elements:3x - 2y - 2y - 2z - 4zAnd you do it again and you get: 3x-4y-2z-4zthen just take away -4z from -2z and you get: 3x-4y-6z
Answer:3. B 4. B
Step-by-step explanation:3. Supplementary equals 180, 113 + 67 = 180