The values of x and y are:
Exercise 2: x = 6, y = √20 / 18
Exercise 3: x = 1, y = 9 / 14
Exercise 4: x = 8, y = 12
Exercise 5: x = 9 / 5, y = 4
Answer 2:
6 * y = 14 * √20 / (4 * 12)
6 * y = 14 * √20 / 48
6 * y = √20 / 3
y = √20 / 18
Answer 3:
1 * 9 = y * 14
y = 1 * 9 / 14
y = 9 / 14
Answer 4:
x * 12 = 12 * 5 + 36
x * 12 = 96
x = 96 / 12
x = 8
Answer 5:
x * 4 = 36 / 5
x = 36 / (5 * 4)
x = 36 / 20
x = 9 / 5