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k in (-oo:+oo)
-6 = k-7 // - k-7
7-k-6 = 0
1-k = 0 // - 1
-k = -1 // * -1
k = 1
k = 1
| -19/2=x-9 | | x+4=13/4 | | 7/10+t=11/10 | | -1+k=9 | | d-2/9=43/9 | | w+5/8=53/8 | | a+3/4=43/4 | | b+3=9 | | w-5=-11/2 | | b+5/6=91/66 | | k-9/10=11/10 | | k-8=-8 | | w+2/5=53/45 | | t+3/8=35/8 | | 1+b=1 | | 3/10+m=83/10 | | x-1=-5/9 | | a^3=B^3 | | b-7=-22/3 | | a+2/3=5/3 | | -5/9+b=85/9 | | 8+n=9 | | -74/11=b-7 | | d+3/4=43/4 | | 2(x-1)=3(x-4) | | -2/3+d=2/9 | | 2/3k=6/11 | | t+10=14 | | 3/10+m=-17/10 | | k/-2=-1/3 | | -17/5=d-3 | | (3x-5)/(x+5) |