Question

Really confused on this geometry problem can someone please help.

Answer 1

the sum of the angles is equal to 180, therefore

`\begin{gathered} m\angle A+m\angle B=180 \\ 2x-10+5x+15=180 \\ 7x+5=180 \\ 7x+5-5=180-5 \\ 7x=175 \\ (7x)/(7)=(175)/(7) \\ x=25 \end{gathered}`

answer:

x = 25