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k in (-oo:+oo)
4 = k+5 // - k+5
4-k-5 = 0
-k-1 = 0 // + 1
-k = 1 // * -1
k = -1
k = -1
| 9x^2-48x-64=0 | | -15=a-9 | | b+3=-1 | | 3=w-9 | | t/4=-5 | | 6=m+2 | | -1=n-8 | | d-7=-1 | | 8+a=-3 | | d+9=18 | | b/-4=-7 | | -3w=0 | | 6=a-1 | | 5+t=14 | | 8+t=12 | | 7+6n+4n= | | 2+k=12 | | 2t=24 | | 14x-20=78 | | 2+k=9 | | 4=b+9 | | 16=w+10 | | 3r+r= | | n+10=22 | | k/-7=-4 | | a+6=17 | | 3+b=-9 | | 7=w+6 | | 2+4h+3= | | 4k^2+k+44=0 | | 5(2x+3)=28 | | 4w=0 |