Answer:
[tex]x=15[/tex]
Step-by-step explanation:
The two marked angles form one side of a line, which we know to be [tex]180^{\circ}[/tex]. Therefore, the angles are supplementary and we can set up the following equation:
[tex]133+(3x+2)=180,\\3x+2=47,\\3x=45,\\x=\boxed{15}[/tex]
