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)
13/10 = 52/x // - 52/x
13/10-(52/x) = 0
13/10-52*x^-1 = 0
-52*x^-1 = -13/10 // : -52
x^-1 = 1/40
-1 < 0
1/(x^1) = 1/40 // * x^1
1 = 1/40*x^1 // : 1/40
40 = x^1
x = 40
x = 40
| x^2+3x-2.7=0 | | 4-4x=4x+40 | | 2=8x+5 | | 4y-22= | | 2x-(4+x)=-22 | | -59=5+8x | | 2x+3(2x+7)=11 | | Y/-7-3=4 | | 5.7X=30 | | 54=6(6x-3) | | 5(3+4x)-5=50 | | 10x-63= | | (x+2)+2x+4= | | 7m-28=-8+2m | | 8p-3=7+3p | | 10r+4=48 | | 233/87=x | | (X+4)(x+5)(x+6)(x+7)=1680 | | 5c+1=-7 | | 5x-14=61 | | 28=60n | | 6-5x=14+5x | | 5+4c=1 | | 6x=3(8x+42) | | 7e-23=x | | 4+5x=-14 | | 9x+18(x-85)=3600 | | -7(x+1)=5-x | | 108+12x=72 | | (6x+5)(4x+3)=3x(8x+11) | | 2ln(2x-1)-9=0 | | 5t^2-19t+25=0 |