T=26 both angles should add up to 180 using that information have the equation say (4t-7)+83=180
Subtract 83 from both sides 4t-7=97 then add 7 on each side 4t=104 then divide each side by 4 t=26 then plug 26 in for t and get your answer which should equal 97 then just add the other angle which was 83 and you will get 180