Answer:
-7
Step-by-step explanation:

it is possible because x is just a letter representing the unknown nos
36 equally-likely outcome: (1,1), (1,2), (1,3), (1,4), (1,5), (1,6), (2,1), (2,2), (2,3), (2,4), (2,5), (2,6), (3,1), (3,2), (3,3), (3,4), (3,5), (3,6), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6), (5,1), (5,2), (5,3), (5,4), (5,5), (5,6), (6,1),(6,2), (6,3), (6,4), (6,5), (6,6)
Solution:
Outcomes with first number being old number and second being even number: (1,2), (1,4), (1,6), (3,2), (3,4), (3,6), (5,2), (5,4), (5,6) = 9 outcomes
P(old,even) = 9/36 =1/4 = 0.25
Because the type of cat food is irrelevant we can add them together:
25 + 35 = 60 kg of cat food
1 kg = 1,000 grams
60 kg = 60,000 grams
60,000 / 300 gram pockets = 200 pockets
He will make 200 pockets (with 60kg of food)