Answer:
12
Explanation:
3y-z is asking 3 x 6 - 6, which equals 12
(3 x 6 = 18 and 18 - 6 = 12)
y = 6; z = 6
3y - z = 3(6) - 6 = 18 - 6 = 12
3.4m questions
4.3m answers