If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
k/(-8.8) = 12.9 // - 12.9
k/(-8.8)-12.9 = 0
-0.11363636*k-12.9 = 0 // + 12.9
-0.11363636*k = 12.9 // : -0.11363636
k = 12.9/(-0.11363636)
k = -113.52000363
k = -113.52000363
| 2sec^2x-tanx=5 | | 32-12y=10 | | 13=-7+10x | | 32-10y=10 | | -2=-2/3x | | 24=-30n | | 0.04t=16 | | -67=4x+9 | | 4(3-4)=12-2(4) | | 2(3x-2)+3(4x+1)=35 | | (-6p-8)+(2p-6)= | | 18+2n=4n+-9 | | 1/3x1/4x1/5 | | 15=13(2q-1) | | y^7-4y^2=0 | | 7.3x-3.6=18.3 | | x^2-10x-168=0 | | m-19=13 | | 7(x+8)+3(x-6)=5(x-8) | | -64=-5x-4 | | 2=-(x^2) | | 6.2x-2.4=22.4 | | 2sin^2x=3(cosx+1) | | C-3=11.5 | | 40p+7(1.5+p)=489.85 | | -6(-6)+3y=-12 | | (s+t)(s-t)(s+t)(s-t)=0 | | n/6=1 | | 7x-44=4x+4 | | 5(3x-2)-4=-24 | | 6r+6-5=51 | | 3(x-8)+2(x-3)=4(8-x) |