Answer: The solution to the system of equations is x = -5 and y = 0.
Explanation:
To solve this system of equations by substitution, you can start by solving one of the equations for one of the variables. For example, you can solve the first equation for x:
x + 2y = -5
x = -5 - 2y
Then, you can substitute this expression for x into the second equation to solve for y:
-(-5 - 2y) - 2y = 5
5 + 2y - 2y = 5
5 = 5
Now that you have solved for y, you can substitute this value back into one of the original equations to solve for x. If you substitute y = 0 back into the first equation, you get:
x + 2(0) = -5
x = -5
So, the solution to the system of equations is x = -5 and y = 0.