Answer
$$-4x + 20y = -12$$
Work Step by Step
Let us write the equation to include multiplying both sides by $-4$:
$$-4(x - 5y) = -4(3)$$
Let's use distributive property to get rid of the parentheses:
$$(-4)(x) - (4)(-5y) = -4(3)$$
Let's multiply out the terms:
$$-4x + 20y = -12$$