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 = 0
x = 0
x in (-oo:0) U (0:+oo)
78/x = 9 // - 9
78/x-9 = 0
78*x^-1 = 9 // : 78
x^-1 = 3/26
-1 < 0
1/(x^1) = 3/26 // * x^1
1 = 3/26*x^1 // : 3/26
26/3 = x^1
x = 26/3
x = 26/3
| (x+16)+3x=32 | | 9x-(-7b-5z)=z+(8b-9x) | | 2[x-3-2x+9]=3x-8 | | 6y=2(y-3)+6 | | 3(x-5)(x-7)=144 | | -0.7x+5.76=-0.5x+1.36 | | d-4=0.4 | | (5n+4n^4-3)+(14n^2+1+8n^4)= | | 43+3r=-10(5+9r) | | 15b=35 | | 8x+(4s-9b)=b+4x-2s | | p+27=13.8 | | 6x-7=-3x+2 | | 9x^3=45x^2 | | v=4/3*314*216 | | 2a-1=4a+4+7a+5 | | 6a-(3m-4a)=a+(m-5a) | | z+13.9=27.2 | | (4+6n^3-12n^2)+(n^2+5-8n^3)= | | (5x-7)/3=(9x-7)/11 | | 6x-16+8x=4x+2 | | 8a+6(a-1)=106 | | v=4/3*314*125 | | A^2b^2-c^2d^2= | | x+(3y-5z)=2-(-4y-2z) | | 56-3n=10(8n-11) | | v=4/3*314*729 | | 4+31=-5(8x-7) | | 119=10r+9 | | sin(2x)-cos(x)-2sin(x)+1=0 | | n-1/3=-3/4 | | (360-x)-x=100 |