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d in (-oo:+oo)
d-10 = -10 // + 10
d-10+10 = 0
d = 0
d = 0
| 2/5t=4/15 | | 8+t=14 | | 2b=14/11 | | w+2/5=11/10 | | 1+k=-7 | | -1/3d=-5/36 | | 10/3=d+1/3 | | 7w=56 | | -1/4+k=-17/4 | | w+7=15 | | 4/9+t=58/9 | | k-1=7 | | a+6=68/11 | | 2=a-10 | | a+3/4=-37/4 | | 7t=-49/10 | | -2/5x=6/25 | | 2a=2/3 | | n+4/7=4/7 | | m-3/5=17/5 | | 1+b=13 | | -8/9=k-5/9 | | d+1/3=37/3 | | 1+b=11 | | t+3=37/10 | | 7k=14 | | d+1/3=22/3 | | M=b+c/2 | | 1+a=-8 | | -8/9=b-8/9 | | t-10=-10 | | 5/7t=30/7 |