Answer:
[tex]3.07[/tex]
Step-by-step explanation:
[tex] \frac{9x + 1}{21} = \frac{11x - 1}{24} [/tex]
[tex]24(9x + 1) = 21(11x - 1)[/tex]
[tex]216x + 24 = 231x - 21[/tex]
[tex]24 + 21 = 231x - 216x[/tex]
[tex]46 = 15x[/tex]
[tex]x = 3.07[/tex]