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)
8/x = 12/15 // - 12/15
8/x-(12/15) = 0
8/x-4/5 = 0
8*x^-1 = 4/5 // : 8
x^-1 = 1/10
-1 < 0
1/(x^1) = 1/10 // * x^1
1 = 1/10*x^1 // : 1/10
10 = x^1
x = 10
x = 10
| X-0.18=697 | | 4sinX+1=-2 | | (-4x+3)2=25 | | 0.33x+0.2=0.36 | | 16/x=32/16 | | 11x*10y= | | (xy^3+x)dx+(x^2y^2+x)dy=0 | | 2y+5s=10 | | p/12=s | | p/12=s | | 5x=x+400 | | 5(2a+3b)+2(3a+4b)= | | 2(6v+3)=18+3(16-3v) | | (17x-8)+(7x+2)=90 | | (17x-8)-(7x+2)=90 | | ((4a^-4)^3(2a^2)^-3)/(2a^-2)^3 | | 4x^2+9y^2-40x-36y+55=0 | | 8x^3+6x^2-27=0 | | 9(4n)=1-2n | | 3X+12Y+Z=15 | | 8x-4-2x=16-2 | | 2x-3+9=x+12 | | 3X+12Y+Z=0 | | (y^2+9)*dx-5xy*dy=0 | | x/x+15=4/9 | | Ln(7x+1)=1 | | 4k+5p-2k+4p=6k-9p | | x^4-5.602253997x-1=0 | | 5x-(7x-29)=7 | | 2t^5+2r^4-144t^3=0 | | (x)3-(x)2=100 | | -13+x=-52+17x |