Firstly, we know that the slopes are the same because parallel lines have the same slope. Then we can find the y-intercept by using the slope and point in slope intercept form.
y = mx + b ---> plug in known values 3 = (3/2)(2) + b ---> Multiply 3 = 3 + b ---> Subtract 3 from both sides. 0 = b
Since the intercept is 0, you will not see a number after the slope and x.