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n in (-oo:+oo)
1 = n-1 // - n-1
1-n+1 = 0
2-n = 0 // - 2
-n = -2 // * -1
n = 2
n = 2
| b/-4=7 | | -1+b=2 | | -5=m-8 | | b+9=4 | | 9+w=10 | | d+6=8 | | 4=d+5 | | d+10=22 | | 17=k+8 | | -(2x-2)+9x=58 | | 5x+6z=77 | | -2=t+3 | | -10+d=0 | | 2=w-8 | | -20=m-10 | | 7=m-3 | | 3=a-4 | | -6+w=-6 | | k+8=16 | | -6b=-24 | | d-1=0 | | 16=k+4 | | m-1=5 | | n+6=17 | | t/-2=-3 | | b-6=-13 | | 3+b=3 | | n+1=5 | | -7+w=-14 | | b-10=-11 | | w-5=-16 | | 2+m=5 |