Question

Please help! Will give medal and fan!
(picture in replies)
Complete the proof below using the 2-column method.
Given: POR + ROS = POS
POS = 31 degrees
Prove: ROS = 13 degrees

Answer 1

So you know
POS=31
POR=3y
ROS=7+y
And
POR+ROS=POS

Can you use substitution to create an equation to solve for y based on the given info?

Answer 2

@nikato I'm not sure what you mean?

Answer 3

So you are given POS+=POR+ROS, right?

Answer 4

@nikato Yep.

Answer 5

And based on what's given and the diagram,
POS=31
POR=3y
ROS=7+y

Answer 6

So substitute the above equation with values

Answer 7

You get
31= 3y+7+y
Can you solve for y?