Respuesta :

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