[tex]\implies {\blue {\boxed {\boxed {\purple {\sf {x\:=\:2}}}}}}[/tex]
[tex]\large\mathfrak{{\pmb{\underline{\orange{Step-by-step\:explanation}}{\orange{:}}}}}[/tex]
[tex]x + 11 + 8x = 29[/tex]
[tex]➺ \: x + 8x = 29 - 11[/tex]
[tex]➺ \: 9x = 18[/tex]
[tex]➺ \: x = \frac{18}{9} [/tex]
[tex]➺ \: x = 2[/tex]
Therefore, the value of [tex]x[/tex] is 2.
[tex]\large\mathfrak{{\pmb{\underline{\blue{To\:verify}}{\blue{:}}}}}[/tex]
[tex]x + 11 + 8x = 29[/tex]
[tex]➺ \: 2 + 11 + 8(2) = 29[/tex]
[tex]➺ \: 2 + 11 + 16 = 29[/tex]
[tex]➺ \: 29 = 29[/tex]
➺ L. H. S. = R. H. S
Hence verified.
[tex]\red{\large\qquad \qquad \underline{ \pmb{{ \mathbb{ \maltese \: \: Mystique35\:ヅ}}}}}[/tex]