I would much appreciate the explanation for number 20 cuz ion’ get it

Answer:
Which is number 20?
Step-by-step explanation:
Which is number 20?
Answer:
Step-by-step explanation:
[tex]\frac{3x}{x+2} =\frac{40}{16} =\frac{5}{2} \\6x=5x+10\\6x-5x=10\\x=10[/tex]