Idont get it? ? how do i set it up? ? im confused? ? can i get some

Well, you need a diagram (see attached).

Since angle S = angle T then

9x -11 = 7x -3  ......  2x = 8 ........ x = 4

RS = RT = 4

There must be some more information that can't be seen

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.