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k in (-oo:+oo)
k+6 = 6 // - 6
k-6+6 = 0
k = 0
k = 0
| 21=m+10 | | -63x^2-23x+56= | | 7k=-84 | | -9+t=-8 | | 9+w=11 | | -4+w=-2 | | n+10=-1 | | 2.3/3.8 | | 7+m=16 | | b-3=-1 | | 2d=20 | | a-9=-8 | | 5y-3x+1=0 | | 6x^2+kx-50=0 | | -4t=-24 | | 9+m=20 | | d-6=-6 | | d+10=20 | | -5t=-5 | | -3=k-5 | | 9=n-3 | | m+9=19 | | d+5=16 | | b+5=9 | | b/2=-2 | | 7+n=8 | | 4x(3+4)= | | w+6=-5 | | w+7=-3 | | 4+w=14 | | 5+k=7 | | b-1=0 |