Answer:
q = 21
Step-by-step explanation:
set 4q - 6 = 78 since the two are congruent angles meaning they equal the same amount
subtract the six and add it to 78
4q = 84
and divide by 4 on both sides to get the variable by itself
21°
(4q-6)° =78°
or, 4q° = (78+6)°
or, 4q° = 84°
or, q = (84/4)°
or, q = 21° ✓
Done and check the photo
