IхI + 4 = 9
IхI = 9 - 4
IхI = 5
х=5 и х= -5
IуI - 4 = 7
IуI = 11
IуI = 11 и у = -11
Iх+2I = 0
х+2=0
х=-2
-х - 2 = 0
-х = 2
х= -2
Iх - 5I = 0
х - 5 = 0
х = 5
-х + 5 = 0
-х = -5
х = 5
I2х - 3I = 0
2х - 3 = 0
2х = 3
х = 1,5
-2х + 3 = 0
-2х = -3
х = 1,5
I5х - 8I = 0
5х - 8 = 0
5х =8
х = 1,6
-5х + 8 = 0
-5х = -8
х = 1,6