Stray cats loved eating goldfish in the pond leaving 12 goldfish. Paige had raised 87 goldfish in the pond initially. How many goldfish disappeared?
1. We are given that Paige had 87 goldfish in the pond initially. 
2. We are told that the stray cats loved eating goldfish in the pond. 
3. We are given that 12 goldfish are left. 

We want to know how many goldfish disappeared. 

We can solve this problem by using algebra. We can set up the equation: 

x + 12 = 87

x = 75

So, 75 goldfish disappeared.