1 person = 130 + (60x7) + 350 = 900
4 people = 4 x 900 = 3600
I think this is right !
Answer if D hope it helps!
In this question you need to isolate j. First you multiply 11 on both sides to make 3 + j not a fraction anymore.
3 + j = 22.
Then you isolate j by subtracting 3 on both sides since you must cancel the 3's out to isolate j. Then you get an answer of j = 19