If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( s )
s = 0
s = 0
s = 0
s in (-oo:0) U (0:+oo)
20985/s = 12/4 // - 12/4
20985/s-(12/4) = 0
20985/s-3 = 0
20985*s^-1 = 3 // : 20985
s^-1 = 1/6995
-1 < 0
1/(s^1) = 1/6995 // * s^1
1 = 1/6995*s^1 // : 1/6995
6995 = s^1
s = 6995
s = 6995
| -8u+6(u+5)=20 | | -2/3x+5=-2 | | 42+.09x=.13x | | x-15x=36 | | 2x^2+x^2=10 | | (2n/3)-(5/11)=(95/33) | | 320/(sqrtx)=1.5x | | 55+0.8x=0.9x | | 540+.1x+.1x+.1x=x | | 49-4y^2= | | (X/4)-3=-9 | | t^2-6t-27= | | 2sqrtx=3 | | 2x3/2 | | -3x+x-5=35 | | -3x^2+30x+33=0 | | x^2-7/3x=1/3 | | 5ln(x)=8 | | 3(t-1)-4(4t-3)=7-6(6t+1) | | -53x-52=-13x+8 | | 90=40t-5t^2 | | X-3=5x-5;3/10 | | (5-w)(5w+6)=0 | | 15x^2+6x-9= | | Y^2(x+5)+3x(x+5)-28(x+5)= | | y=0.2179x+15.72 | | 4x+120-80x^2= | | 4x(y)=3-7x | | 224x+98128x^2= | | -k-2=-4 | | 2a-2b-2c=1.5 | | 4y(x)=3-7y |