55) Find the value of two numbers if their sum is 19 and their difference is 5 .

Step 1 ：We have two equations here: \(x + y = 19\) and \(x - y = 5\). We can solve these equations simultaneously to find the values of x and y.

Step 2 ：Solving the equations gives us the solution: \(x = 12\), \(y = 7\)

Step 3 ：Final Answer: The two numbers are \(\boxed{12}\) and \(\boxed{7}\)