Given the angles of a triangle:
x, 2x and x + 8
And we have that the sum of the internal angles of a triangle is equal to 180°. Therefore:
[tex]x+2x+x+8=180[/tex]Then, we solve for x:
[tex]\begin{gathered} 4x+8=180 \\ 4x+8-8=180-8 \\ 4x=172 \\ \frac{4x}{4}=\frac{172}{4} \\ x=43 \end{gathered}[/tex]Answer: x = 43
