Answer:
The answer is "
"
Explanation:

In equation (a) multiply by 2 then subtract from the equation (b):

put the value of x in equation (a):

Different people have different concerns. Some people see the environment as a beautiful thing that we need to protect and conserve. Some people do not care about the environment at all or they do not see the problems as problems.
Oxygen and glucose at top
carbon dioxide and water at bottom