Answer
Addition method
Work Step by Step
$$ 3x - 2y = -3$$ $$ 6x + 2y = 12$$
A system composed of these equations would be easier to solve using the addition method. Doing that will enable us to immediately cancel the term $(2y)$ since it has opposite signs in the two equations. Then, we will only be left with a single variable to solve:
$$ 3x - 2y = -3$$ $$+$$$$ 6x + 2y = 12$$ $$9y=9$$ $$y=1$$