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k in (-oo:+oo)
-1 = k-6 // - k-6
6-k-1 = 0
5-k = 0 // - 5
-k = -5 // * -1
k = 5
k = 5
| w/7=6 | | b/6=-3 | | t+8=10 | | 16=b+7 | | w+4=7 | | -9+d=-3 | | -2+m=-2 | | d/-4=-5 | | 8/7x=104 | | 7w=21 | | -8+m=-2 | | 16=a+7 | | 4+d=16 | | -8+a=-1 | | (2x+5)(2x+5)=-7 | | -3d=-9 | | a-7=-12 | | -5+t=-12 | | 10=k+10 | | 2/3*3/2(x+9)= | | m+7=15 | | 7=d+10 | | 116-3x=5x+12 | | -5=m+7 | | d+4=8 | | -5k=15 | | 4k=-48 | | 7+b=1 | | d-10=0 | | d+5=-3 | | 5+m=17 | | 7k=70 |