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k in (-oo:+oo)
-9 = k+3 // - k+3
-k-9-3 = 0
-k-12 = 0 // + 12
-k = 12 // * -1
k = -12
k = -12
| 6+x=13/2 | | k/-5=4 | | d-5=-59/12 | | 1/6b=1 | | 7t=84 | | n/2=4 | | t+5/6=11/6 | | n+10=21/2 | | b+1/3=-7/33 | | 6/7m=-12/35 | | 101/9=a-7/9 | | b+4=9/2 | | n-1/8=25/56 | | -8+t=3 | | 3/7+d=-81/7 | | -5/6+a=-5/6 | | 1/2+a=-3/2 | | k+1=11/8 | | m/-4=6/7 | | a+1/6=25/42 | | k-1/3=20/3 | | n/7=6/7 | | 7w=7/9 | | w+5=37/7 | | d+5=9 | | 2/7t=2/7 | | m-2/5=-17/30 | | w-3/5=7/5 | | n+1/8=57/8 | | -1/2n=-1/12 | | 8=t+9 | | 6b=4 |