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a in (-oo:+oo)
-3 = a+6 // - a+6
-a-6-3 = 0
-a-9 = 0 // + 9
-a = 9 // * -1
a = -9
a = -9
| m/-3=7 | | m+4=10 | | 3+w=11 | | -1=m+5 | | t/6=5 | | x+3/3-x=x/x-1 | | -6t=72 | | -4+k=-4 | | d/6=-3 | | -40-4x=8x-10x | | t-8=-8 | | 4+k=16 | | 9+t=6 | | n/5=-7 | | m-5=-1 | | -40-4x=8x+20 | | w+1=-3 | | w-2=-1 | | a-4=5 | | b-9=-17 | | 1=x+9 | | -8+n=2 | | -2k=22 | | -22=a-10 | | b+3=7 | | -5+k=0 | | a/7=-2 | | w-3=6 | | 17=n+5 | | 18=a+8 | | b-1=4 | | 4+k=-1 |