Answer:
[tex]{ \rm{(2x + 156) = (4x + 192)}} \\ { \tt \{alternate \: angles \}} \\ \\ { \rm{4x - 2x = 156 - 192}} \\ \\ { \rm{2x = - 36}} \\ \\ \dashrightarrow \: { \rm{x = - 18}}[/tex]
[tex]\\ \sf\longmapsto 2x+156=4x+192[/tex]
[tex]\\ \sf\longmapsto 2x-4x=192-156[/tex]
[tex]\\ \sf\longmapsto -2x=36[/tex]
[tex]\\ \sf\longmapsto x=-18[/tex]
