Answer:
Im not 100 percent sure but I think you have to do this
Step-by-step explanation:
Add all numbers together to find total students
Then add the students in Chemistry and Physics and both together
Then find what that number is in percent to the total students
You would just have to isolate for x
so it would simply become
-1.56/-7.8
= 0.2
1. Pretty sure -2x+4/3
2. x+3/x-4
