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 = 15/5 // - 15/5
8/x-(15/5) = 0
8/x-3 = 0
8*x^-1 = 3 // : 8
x^-1 = 3/8
-1 < 0
1/(x^1) = 3/8 // * x^1
1 = 3/8*x^1 // : 3/8
8/3 = x^1
x = 8/3
x = 8/3
| 3(5x-2)=12 | | 0.2-1.4=15.82-0.5x | | 64m^2-169n^2=0 | | M/6-3=2 | | 4(x)=24-x(2) | | 14x-7x-5x=14-2 | | ln(10)-ln(x-1)=2 | | 3000=75x+x | | 3.5+13=23.5 | | -2f+3=f-12 | | 6m+5=2m+35 | | u^5+5u^4-2u^3-10u^2+u+5=0 | | 7=2(n+6) | | 8x-3y=-15 | | 15p=-270 | | n+2-3n=8 | | 13=w/3.5 | | 4tan(x-0.2)-3=-9 | | 2x+x+60+90=180 | | x+100+3x=180 | | x=100+3x+180 | | 4y=-7x-5 | | 4a+6=10+a | | 12x+40=5x+5 | | -9x+5=6x+4 | | 2n^3-12x^2-3n=18 | | 6x^3-4x^2-6-4=0 | | In(4x)ln(5)=1 | | n-2.5=3.1 | | -15(r+748)=75 | | (2k^2+27k+70)(k+10)=0 | | -563=-8u+61 |