Answer:
Corresponding Angles; x=35
Explanation:
These are corresponding angles.
To solve this, make the two angles equal to each other.
4x+7 = 6x-63
Push the variables to one side and the numbers to the other
4x-4x+7+63= 6x-4x-63+63
7+63=6x-4x
70 = 2x
x=35
Now, plug it into one of the angles. It does not matter which, both angles are the same.
4(35)+7 = 147
(It was at this point i realize that you were looking for the x value, not the angles, but I guess this is a bit extra.)