Answer:
b=40
Step-by-step explanation:
Since PQ is equal to RQ triangle PQR is isosceles. Angle PRQ is equal to 40 degrees because of supplementary angles. And since triangle PQR is isosceles angle b is equal to angle PRQ which means angle b is equal to 40
Dividing first.
Multiplying and subtracting.
Division.
12
36 divided but 3 is 12 so x=12
