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a in (-oo:+oo)
a-4 = 5 // - 5
a-5-4 = 0
a-9 = 0 // + 9
a = 9
a = 9
| 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 | | 9+b=10 | | 5+w=13 | | 9+m=0 | | k/7=-1 | | k+4=-3 | | 1+t=-8 | | -6=t+2 | | -6+t=5 | | k+10=16 | | 1+w=-9 | | -7+w=-11 | | 6+d=-4 | | k+5=14 | | d/6=-4 | | 3+m=13 | | -2+w=-1 | | -7a=-70 | | m+2=6 | | k+8=11 |