Answer: x = -3, y = 6
Explanation:
We will use substitution to solve this system of equations.
Given:
2x + y = 0
x + y = 3
Set one equation equal to a single variable:
2x + y = 0
y = 3 - x
Substitute and solve for the unknown:
2x + y = 0
2x + (3 - x) = 0
x + 3 = 0
x = -3
Substitute that value into the equation to solve for the other variable:
x + y = 3
(-3) + y = 3
y = 6