Question

can i get some help?... please
with study of proofs >
http://i.imgur.com/v5FNwnd.jpg

Answer 1

For the first blank, the sum of the three angles is 180.

So write all the angles down and add them up and set it equal to 180. Do NOT write the value of each angle.
For example, m<P is the angle but the value of angle P is 5x.

Next simplify the equation they gave you. That shouldn't be that hard. Add all the like terms and you should get your answer for that blank.

Finally divide both sides by the coefficient of x to isolate x and find the value of the variable. And you're all done.

If you have questions about it, feel free to ask.

Cheers!