Answer:
71
Step-by-step explanation:
We can find the value of x
63 + 15x -3 = 180 since they from a straight line
Combine like terms
60 +15x = 180
Subtract 60 from each side
60-60+15x = 180-60
15x =120
Divide each side by 15
15x/15 = 120/15
x =8
We know that <1 = 8x+7 since they are vertical angles
= 8(8) +7
=71
