Answer: D 87%
Step-by-step explanation:
Ap-ex
Answer:

Step-by-step explanation:
Rewrite the system of equations as:

Subtract the second equation from the first to isolate
:

Plug in
into any of the equations above and solve for
:

Verify that the solution pair
works 
Therefore, the solution to this system of equations is:

Add all sides together to find the length of each side
Answer:
The answer I got for this equation is x=5
I hope this image helps of showing you how to solve the equation.