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
(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