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)
-5 = 5/x // - 5/x
-(5/x)-5 = 0
-5*x^-1-5 = 0
-5*x^-1 = 5 // : -5
x^-1 = -1
-1 < 0
1/(x^1) = -1 // * x^1
1 = -1*x^1 // : -1
-1 = x^1
x = -1
x = -1
| -13+14x=2x-1 | | -11(-11x+-3)+-9(4x+8)=-39 | | 2w+18=-w-5 | | 1/3m=1 | | 4c-y=2 | | 50-4x=6x+10 | | 16x+5y=900 | | 5x+8x-2x-5=50 | | 8(p+1)-7=15p-4 | | x/5x20=12 | | 17x+4y=5 | | 5(w+6)-7w=12 | | X/5x20= | | x=0.3x+0.3 | | 2m-6/5=-2 | | 5a^2-20a= | | 100+10m=155m | | -d/2=252-491-51508 | | x=72x^2 | | 2x-19=3x+7 | | Z/5-6=2 | | 11X+12=4X+24 | | 2(12x+11)=12(2x+12) | | 2(3x-5)+2x= | | 3/5x/74/5 | | -9r=-9 | | 5x+20+4x+11=180 | | 5x^2+46x+9=0 | | 180+4x=180 | | 24+5x=3+5(x+5) | | x+12=2(x+6)+4 | | x=-8y-7 |