Answer:
y=4+3x
Explanation:
9x-3y=-12
subtract 9x from x on the other side, there is no x on the right side so we move the 9x right next to the 12 making 12-9x. we need to get rid of -3y so we divide all the rest of the numbers by -3 leaving you with y on its own. putting it all together gets you y=4+3x