b)-3.!x-3!=-27
!x-1!=-27/-3
!x-1!=9
x-1=+-9
TH1 TH2
x-1=9 x-1=-9
x=9+1 x=-9+1
x=10 x=-8
a, = 34.16 - 34.44 + 44.34 - 44.16
= 16.(34 - 44 ) + 44 .( 34 - 34 )
= 16.(-10) + 44.0
= -160
b, ! x-1 ! = -27 : (-3)
! x-1 ! = 9
TH1 : x-1=9 => x= 10
TH2 : x-1 = -9 => x = -8