The answer is B. 3
It is the only value not attached to a variable, thus remaining constant.
Answer:
I'm pretty sure the answer is the second choice
Step-by-step explanation:
because you have to add X to both sides
3f+3=t
s=2f
21=f+s+t
21=f+(2f)+(3f+3)
21=6f+3
18=6f
3=first
6=second
12=third
the answer is:
42.5
......
i commented the explanation in my answer
