here is your answer my friend.
[tex] \frac{3x}{4} + 5 = 11[/tex]
[tex] \frac{3x + 20}{4} = 11[/tex]
[tex]3x + 20 = 44[/tex]
[tex]3x = 44 - 20[/tex]
[tex]3x = 24[/tex]
[tex]x = \frac{24}{3} [/tex]
[tex]x = 8[/tex]
