Step-by-step explanation:
Put the value of x = -6 to all expressions:

Answer: 33.041666
Step-by-step explanation:
Given: The translated equation : 
To find the value of x if y = 87.5, we need to substitute the value of y in the given translated equation, we will get

Subtract 87.5 from both the sides , we get

Now, divide 300 on both the sides, we get

Answer:
4 years
Step-by-step explanation:
FYI this sounds like a personal problem
There have to be at least 4 ducks recovered