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n in (-oo:+oo)
-2 = n+2 // - n+2
-n-2-2 = 0
-n-4 = 0 // + 4
-n = 4 // * -1
n = -4
n = -4
| -1+x=-11 | | 7a=-42 | | -4x-5(2x-10)=190 | | 2y-13=-6x-5 | | 0=b+4 | | 13=d+3 | | 1=a-10 | | -1+w=3 | | k+5=-4 | | -6-7x=-118 | | -8+b=-11 | | -8+d=-14 | | 3=k-4 | | -3=k+8 | | t+6=8 | | -5-7v=-61 | | 4=b-7 | | -1=b+7 | | 5+d=-7 | | k/-7=-6 | | -9+w=-12 | | 1y-5x=12 | | 4(2x-3)=7x-13 | | 63=4x+7 | | -14=d-5 | | -2d=14 | | 10=a+9 | | t-2=4 | | w+10=19 | | m+5=-7 | | b+9=7 | | a-1=5 |