$21 I believe (it's 1 am where I am so I'm not 100% sure but I think it's correct)
Answer:
and 
Step-by-step explanation:
Given

Required
Find x and y
In the second equation. Assume that:

Substitute
in the first equation


Collect like terms


Multiply through by 5


Solve for x

Substitute this value of x in 





I'm just guessing but maybe expressions
Answer:
Unknown
Step-by-step explanation:
What is the question? You have the information listed but you forgot to ask the question.