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)
1.3 = -15/x // + -15/x
1.3-(-15/x) = 0
15*x^-1+1.3 = 0
15*x^-1 = -1.3 // : 15
x^-1 = -0.08666667
-1 < 0
1/(x^1) = -0.08666667 // * x^1
1 = -0.08666667*x^1 // : -0.08666667
-11.53846109 = x^1
x = -11.53846109
x = -11.53846109
| (x^2+y^2)=48 | | 80x-16x^2+3=0 | | 100[0.08(m+8)]= | | 5x=100+(-5x) | | 6-(2x-1)=3x-(x+3) | | -2-(4-w)=1 | | 3x+12=-4x | | 8-2(3x-1)=-2 | | (2x+1)=15+3x | | 3x^2/6x | | 5(x+1)=2(x-4) | | 12x-x=2-3 | | -10+4k=6 | | 11=6(x-6) | | 11(x-6)=6 | | 3(x+3)=2(x+6) | | log(2)(5x-3)=1 | | 3(x-6)=-7 | | 3x-15=3x+9 | | 100(t^2)+40t-1=0 | | 7(4)-3(-2)+5= | | 6x+24=45 | | 4x-2=3x-12 | | 3x-15=-3x | | 3(1-x)=0 | | 10(2-x)=0 | | 10(x-6)=0 | | 2(x-7)=-2 | | 4(x-9)=0 | | -27-3y=27 | | 20/6.28 | | 3x-15x+10x=5+3 |