Final Answer:
Case 1: x = 8 and y = 10
Case 2: x = 5 and y = 15
Step-by-step explanation:
In the given question, two cases are given which require us to solve for the missing amounts. Let us consider the first case. In the first case, the sum of x and y is given as 18. This implies that x + y = 18.
Since the value of y is given as 10, we can solve for x using algebra. By subtracting 10 from both sides, we obtain x = 18 - 10 = 8. Similarly, for the second case, the sum of x and y is given as 20. Therefore, using the same process, we obtain x = 20 - 15 = 5.
Therefore, the missing amounts in the two cases are x = 8 and y = 10 in case 1 and x = 5 and y = 15 in case 2.