Odpowiedź:
a)
3IxI = 2
IxI = 2/3
x = 2/3 ∨ x = - 2/3
b)
- 3/2IxI = - 6
IxI = - 6 : (- 3/2) = - 6 * (- 2/3) = 6 * 2/3 = 2 * 2 = 4
x = 4 ∨ x = - 4
c)
1/4IxI - 1/2 = 2 3/4
1/4IxI = 2 3/4 + 1/2 = 2 3/4 + 2/4 = 2 5/4 = 3 1/4
IxI = 3 1/4 : 1/4 = 13/4 * 4 = 13
x = 13 ∨ x = - 13