Answer:
use of Wires , Clamps , and measuring tools
Step-by-step explanation:
To ensure parallel rails we can use : Wires , Clamps , and measuring tools as well
The use of wires are very effective and most stressful and they are used mostly when working with wooden rails , while you can use Clamps and other measuring tools for every kind of rails to ensure they are parallel.
I don't know what the question is but I'm pretty sure the answer is 5.5.
X = 5.5 or the price of each cake is 5.5$