If fg = 2 units, fi = 7 units, and hi = 1 unit, what is gh?

Does the line look like this?

FGHI

2+X+1=7
3+X =7
X = 4

ffbbf

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.