You did not complete your question but I think this is what you are looking for. View the image.
Answer: 20.67
Hope it helps
184/8=23
8=alice
9=bernice
18=cheryl
8:9:18=184:207:414
Add 4x over to 14x, 3=5x2- 18x then add 18x to the other side 3+ 18x= 5x2then divided each side by 5,( 3+18x/5=x2) then square root each side the answer to x would be the square root of 3+18x/5