Question

I will show you the question

Answer 1

Since lines m and n are parallel this means that the angles 1 and 2 are congruent, this comes from the fact that alternate interior angles between two parallel lines are equal. Then:

`\begin{gathered} 7x=5x+30 \\ 7x-5x=30 \\ 2x=30 \\ x=(30)/(2) \\ x=5 \end{gathered}`

Therefore x=15° and the answer is option 2