z:(-19)=-18
z=-18×(-19)
z=342
22z+440=0
22z=-440
z=-20
z-100=-2012
z=-2012+100
z=-1912
z+29=-718
z=-718-29
z=-747
-35z=-210
z=-210/35
z=-6
z:(-19)=-18
z=-18×(-19)
z=342
22z+440=0
22z=-440
z=-20
z-100=-2012
z=-2012+100
z=-1912
z+29=-718
z=-718-29
z=-747
-35z=-210
z=-210/35
z=-6