Answer:
C) 3x + 3y - z - 7
Explanations:
The given expression is:
(4x + 2y - z) - (x - y + 7)
Remove the brackets by explanding the equation:
4x + 2y - z - x + y - 7
Collect like terms:
4x - x + 2y + y - z - 7
Simplify the expression:
3x + 3y - z - 7