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daphnewong

not sure if the reasons were the right vocabulary but i hope this helped!
Ver imagen daphnewong
We know that  <POR and <ROS equal 31 degrees, so 3y+7+y=31. If you combine the 3y and y you get 4y+7=31. Now we subtract 7 from each side and get 4y=24. Then we divide 4 from each side and get y=6, and <ROS= 7+y which is now 7+6 which equals 13.