We need to find what Y is. First we need to distribute the parenthesis on the left side. 15-2y-6=4y-9 We can add like terms. 9-2y=4y-9 Let's add 9 to both sides. 18-2y=4y Let's add 2y to both sides. 18=6y Let's divide by 6. 18÷6=3=y So, y=3. Also using a graph, you can tell that the y intercept is 3 as well.