The sum of angles on a line is 180 degrees. So, the sum of the angles 2x+16 and 5x+3 is 180 degrees . So
[tex]\begin{gathered} 2x+16+5x+3=180 \\ (2x+5x)+(16+3)=180 \\ 7x+19=180 \\ 7x=180-19 \\ 7x=161 \\ x=\frac{161}{7}=23 \\ \end{gathered}[/tex]The value of x is 23.
