Answer:
f=2/6
Step-by-step explanation:
Write an equation
f/(-2/3)=-1/3
Solve
f=(-1/3)*(-2/3)
f=2/6
Answer:

Step-by-step explanation:
Given


Required
Find PQR
Since both angles are supplementary, we have:

This gives:


Collect Like Terms


Divide through by 10

Substitute 20 for X in 

