Explanation:
As you said in the question the sum of the interior angles of a triangle is 180º
[tex](p+1)+(p+23)+(2p)=180[/tex]
We have to sum the terms that have p and the terms that don't:
[tex](p+p+2p)+(1+23)=180[/tex][tex]\begin{gathered} 4p+24=180 \\ 4p=180-24 \\ 4p=156 \\ p=\frac{156}{4}=39 \end{gathered}[/tex]
Answer:
p = 39
