Siiigh...I am so horrible at math.. I'm a class behind everyone lol

Anyway, Heres my problem:

Line segment AC in bisected by ray BD at point B. Ray BT bisects angle DBC.

a. If angle DBC= 25x+7 and angle TBC= 12x+5, find the degree measures of angle TBC, DBT and DBC

b. If angle CBT= 10x-8 and angle TBA=15x-12, find the degree measures of both angles.

I drew a diagram and everything, but I am still utterly confused.

<33 Buyo