If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x^2 = 0
x = 0
x = 0
x^2 = 0
x^2 = 0
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in (-oo:0) U (0:+oo)
x/x-((8*x)/(x^2))-5-5+15 = 0
x/x-8*x^-1-5-5+15 = 0
-8*x^-1 = -6 // : -8
x^-1 = 3/4
-1 < 0
1/(x^1) = 3/4 // * x^1
1 = 3/4*x^1 // : 3/4
4/3 = x^1
x = 4/3
x = 4/3
| 10.50x=550 | | 7m1/b | | 2(4n+10)=32 | | 2/3=w+1/4 | | -4-(-g)=-11 | | a=9.8s^2 | | 8(2+n)=16 | | 1=-5/6x-7 | | 0.04x=3360 | | Y=-5/6(1)-7 | | 0.04x=6000 | | Y=-5/6(0)-7 | | 3x+6x+2+1=84 | | 2x+8+3=36 | | 5x+1+9=20 | | 8x-8(-2)=0 | | 8(0)-8y=0 | | 6x+3+5=24 | | 0.12x=75 | | r-17/3=-5 | | 5x+x+8=20 | | Y=2(-3)+1 | | -2-3(-8n-6)=6(3n+2)-8 | | a/7-4=5 | | 0.75x=7.5+0.5x | | 2t+4=3t-1 | | 7(3x+2)=4(x-4)-2 | | 3(x+6)-2=12 | | x/-3+3=-8 | | (6/x)+(4/(x+7))=3 | | 3y+36=3(4y+3) | | (6/x)+(4/(x+7)) |