Answer:
x = 50
Explanation:
In order to solve this question, we need to make the number next to x equal to 1.
To do this, we multiply x by 5, to cancel out the 1/5.
However, we can't just change one side of an equation and not the other, so we also need to multiply the other side by 5 as well.
It all ends up looking like this:

Therefore our answer is x = 50 :)