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)
39/6 = 52/x // - 52/x
39/6-(52/x) = 0
39/6-52*x^-1 = 0
-52*x^-1 = -13/2 // : -52
x^-1 = 1/8
-1 < 0
1/(x^1) = 1/8 // * x^1
1 = 1/8*x^1 // : 1/8
8 = x^1
x = 8
x = 8
| Y-3/4=3 | | -4(2w+-8)=4+-12w | | 6-5/x=1/2x | | C=-0.25m+1 | | -4(2-x)=.8(x+14) | | x+2x+4x+12=2x+3x+38 | | 5x+24=24 | | C-5/4=13 | | 6=m-2/3 | | 8r^2-72r+112=0 | | -4(s+55)=-100 | | 2x+25=1015 | | 20/3n=26.67 | | 13+p=76 | | 4x(3x-9)= | | z^5+3=0 | | X/6=20/16 | | 11x+35+x+1=180 | | x+8(5)=37 | | -49^(1/2) | | -6x+7y=-5 | | 3/7n-8=8/3 | | H+(-17)=0 | | 5=20+3(x) | | K/5-20=4 | | (16n^2)3/2 | | -5(y-87)=-45 | | x/100=60/70 | | 180-56-31= | | 100+25x=35x | | z^5-3i=0 | | 5a+6-2a= |