Respuesta :

Replace all "z" with "7"

(7) - ((7)-(7)) ÷ (7) × 9

Parentheses first.

(7) - (0) ÷ (7) × 9

then divide

(7) - 0 × 9

then multiply

7 - 0

then subtract

FINAL ANSWER: 7

Answer:

7

Step-by-step explanation: