x-3=-19 x=-16
3x-5=-3 x=2/3
-3x=21 x=-7
-2/3x+4=-2 -2x+12=-6 -2x=-18 x=9
x+25=6 x=-19
1/3x-1/2=1/6 2x-3=1 2x=4 x=2