Answer:
t = 12
Step-by-step explanation:
sum of angles on a straight line = 180 degrees
Therefore:
(8t - 7) + 91 = 180
8t + 84 = 180
8t = 180 - 84
8t = 96
Thus t is equal to 12
12
180-91 = 89 (supplementary angle)
(8t-7)=89
8t=96
96\8 = 12
T = 12
