Question

I understand the problem but I do need help with finding the angle measure

Answer 1

$\begin{gathered} \text{ To find the angle measure, we replace x by 15!} \\ 5x+6,\text{ replacing x by 15 we get} \\ 5(15)+6=75+6 \\ =81\text{ } \\ \\ \text{the measure of the angles is 81!} \end{gathered}$