Penjelasan dengan langkah-langkah:

To find the value of C and its characteristics, we can use a system of equations:

A + B = 18 A + C = 19 B + C = 22

We can solve for C by substituting the first two equations into the third:

B + C = 22 B + (A + C) = 22 (substituting A + C for B from the second equation) A + 2C = 22 2C = 22 - A C = (22 - A) / 2

So now we know that C is equal to (22 - A) divided by 2. To find its characteristics, we need to know the value of A. We can use the first equation to solve for A:

A + B = 18 A = 18 - B

Now we can substitute this expression for A into the second equation:

A + C = 19 (18 - B) + C = 19 C = 1 + B

So the characteristics of C are that it is equal to 1 plus B, and its value is (22 - A) / 2, where A is equal to 18 minus B.