Answer:
4x + 2y - 3z -3.
Explanation:
2x+5y+z-6)+(6x-4y-z+7)+(-4x+y-3z-4)
Removing the parentheses:
= 2x + 5y + z - 6 + 6x - 4y - z + 7 - 4x + y - 3z - 4
Bringing like terms together:
= 2x + 6x - 4x + 5y - 4y + y + z - z - 3z - 6 + 7 - 4
Simplifying like terms we have:
4x + 2y - 3z -3.