Question

The total amount of fiber (in grams) in a package containing x apples and y oranges is given by the equation 5x + 10y = 110. Is it possible for the package to contain 15 apples?

Answer 1

It is, if you are allowed to have half an orange. If not, then you cannot have 15 apples.

15= x, so you’d plug that into the equation and solve like this:
5(15) + 10y = 110
75 + 10y = 110
Subtract 75 from both sides
10y = 35
Divide ten by both sides
y= 3.5

Answer 2

The answer is NO
Because if x=5 the equation is 125+10y=110
In this case y will be a negative
You can’t have a negative oranges
So the answer is NO