If it's not what You are looking for type in the equation solver your own equation and let us solve it.
s^-7s-8=0
We add all the numbers together, and all the variables
-6s-8=0
We move all terms containing s to the left, all other terms to the right
-6s=8
s=8/-6
s=-1+1/3
| 2,56x+3,25=10,74-6,54x | | 6^x+2^x=64 | | 5x+(3x4)=20 | | 3x2^x+2^x=64 | | 3x2¨^x+2^x=64 | | 20+7x=2x+25 | | (X+9)=(2x-4) | | (15/21)x=x-4 | | 90x-120=75x-135 | | (4x-6)×(2x-8)=0 | | 40+3x=8x | | 15x/21=x-4 | | 5n-3=7 | | 2x=1-11 | | 4x+72=16x | | 18x^2+6x-5=6(3x^2-2x+3) | | s^2+3s-2=0 | | 2×(x+5)=10-x | | 6×x-7=4×x+5 | | 6d=2d-8 | | 4+y/4=6.5 | | 2.5+x=6.71 | | 6+3x9=18 | | a+15=4a-4 | | -3x+30/x=12 | | 8•2x=36 | | 13p-4=61 | | 4y+3=7+2y | | (x+)2=x2+10x+ | | 4x+10=+50 | | 6-5x=7+3 | | 3b+1=9-b |