First, we need to find the angle of y. We're given a straight line with three adjacent angles, one of which is y. We know the total of adjacent angles along a straight line should be 180 degrees. Therefore:
52 + y + 59 = 180
y = 69
Now, we know two angles of the triangle. We know the total of the interior angles of a triangle must be 180 degrees. Therefore:
x + 63 + 69 = 180
x = 48
Thus, x is equal to 48.