Answer:
f=1
Explanation:
First, we have 1.54(f+4)=7.7. Here we are going to need to distribute the 1.54 to everyone inside of the parenthasies.
So now we have 1.54f+6.16=7.7. We now have to isolate our variable to get what the value of f is. In order to do this, we must do the opposite symbol 6.16 from both sides of the equation. So we will subtract since 6.16 is positive. So 6.16-6.16 cancels out and we have to do it to the other side so we do 7.7-6.16 and get 1.54.
From here we are almost done! Our equation should look like this:
1.54f=1.54
Now, we have to isolate the variable one more time to get f by himself. Doing the opposite of multiplication(since any number next to a variable means multiplication) we divide both sides by 1.54 and get f=1
Hope this helps!!