Answer:
y=-3
Step-by-step explanation:
First you wanna move your -3 to the other side to isolate y. To do this, add 3 to both sides since you were. originally subtracting it. After doing this you get -9=3y. Now you'll want to divide both sides by 3 since you want to isolate y and 3 is being multipliied by y so you'll want to do the opposite and divide both sides by 3 to get y=-3.
