Answer:
x = 7
Step-by-step explanation:
[tex]4 = \frac{x+9}{x-3}[/tex]
[tex]\frac{16}{4} = \frac{20}{5} = \frac{24}{6} = \frac{28}{7}[/tex]
If you try all of these, you'll see that only [tex]\frac{x+9}{x-3} = \frac{16}{4}[/tex] when x is 7
