Stuck on two questions that was in a review section.

1) How can I graph the ellipse: x^2/4 + y^2/36 = 1?

2) How do I solve for x: 3x/2 - 3/4 = x/8?

Here's what I've done so far:

3x(4)/2 - 3(2)/4 = x/8

12x/2 - 6/4 = x/8

48x/8 - 12/8 = 4x/32.........this is where I got stuck when trying to get all the denominators the same.

Thanks in advance.