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)
(2/5)/45 = 70/x // - 70/x
(2/5)/45-(70/x) = 0
(2/5)/45-70*x^-1 = 0
-70*x^-1 = -2/225 // : -70
x^-1 = 1/7875
-1 < 0
1/(x^1) = 1/7875 // * x^1
1 = 1/7875*x^1 // : 1/7875
7875 = x^1
x = 7875
x = 7875
| 5y+3(y+6)=3(y+2)-2 | | 6x-7(-3x-17)= | | X^2-2x=51 | | 2sinx+tanx=0 | | h(t)=-16t^2+96t+15 | | sqrt(3x^3+2x^2+2)+sqrt(-3x^3+x^2+2x-1)=2+2x+2x^3 | | 3(-7)=27 | | 1/3/6=4/x | | -16t^2+39t+324=0 | | -8(y+2)=7y+29 | | 6/13y^2-8/5y | | 10-5(2x-1)=2(6x+13) | | -20=-6x+4(x-8) | | 5(2n+6)=-100 | | 2-13=y-5 | | 2t+3-5t= | | 6x(11-6)/2 | | 8v=16+4v | | 13/3=p/6 | | 25(n-1)+100=5(2n-1) | | 6m-6=30 | | 3m=13n | | 7/3x-11=25 | | 4+2y-x=0 | | 30b-30=5b-25 | | 2(2z+2)=5z-7 | | 2k+20=56 | | 10-2y-x=0 | | 5x=-y | | -2y-x=-6 | | (3x+1)*(3x-4)= | | 5w+6=-9 |