Addition should be the answer to your question
it's 7 it's 7 it's 7 it's 7 it's 7 it's 7it's 7 it's 7 it's 7it's 7 it's 7 it's 7
Both are correct they just chose a different variable to solve for first. they will both get correct answers if they do the rest correctly.
The answer to your question is b.
Could you take another photo with you zoomed a lil bit more so I can answer it?
