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k in (-oo:+oo)
5 = k+1 // - k+1
5-k-1 = 0
4-k = 0 // - 4
-k = -4 // * -1
k = 4
k = 4
| 6+d=17 | | 6x+8=-3+-10 | | 3+t=0 | | k/-7=5 | | 20=n+8 | | -2a=6 | | 10=b+1 | | t-5=-16 | | -2b=12 | | 20=.5x(2x+2) | | -16=-4/5u | | -3=a-10 | | b-8=-4 | | b-2=7 | | 1=n-3 | | m/-3=-4 | | b-6=-17 | | d+1=6 | | a+9=18 | | -5=k-10 | | -11=t-2 | | -4+w=1 | | k-10=-7 | | -3+x=4 | | 6=n-2 | | 4=m-8 | | b+4=-6 | | d+8=18 | | n/5=-4 | | 7+d=19 | | m/7=-5 | | -8+a=2 |