Answer:
I think the answer would be -5
Step-by-step explanation:
Sorry if its wrong
<h2>
Explanation:</h2>
We use an equation to say that two things are equal. An equation always has an equal sign "=". So an equation tells us that the left side is equal to the right side. In this case, we have the following equation:

So the only value that makes this equation to be true is 5, because:

For instance, let's choose another value, say, 8. So substituting:

2+2+1 3/4+1 1/4+1+1=9 . Hope this helps :)
Answer:21
Step-by-step explanation: you multiply f times x to equal 21