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
2.5/x <= 0
x = 0
x = 0
2.5/x <= 0
2.5/x <= 0
2.5*x^-1 <= 0
2.5*x^-1 <= 0 // : 2.5
x^-1 <= 0/2.5
x^-1 <= 0
1/(x^1) <= 0
x <> 0
1/(x^1) <= 0 // * x^2
(x^2)/(x^1) <= 0
x^1 <= 0
x <= 0
x in (-oo:0)
x in (0:+oo)
7 = ln(2.5/x) // - ln(2.5/x)
7-ln(2.5/x) = 0
7-ln(2.5/x) = 0 // - 7
-ln(2.5/x) = -7
-ln(2.5/x) = -7 // * -1
ln(2.5/x) = ln(e^7)
2.5/x = e^7
2.5/x-e^7 = 0
2.5*x^-1 = e^7 // : 2.5
x^-1 = 0.4*e^7
-1 < 0
1/(x^1) = 0.4*e^7 // * x^1
1 = 0.4*e^7*x^1 // : 0.4*e^7
2.5*e^-7 = x^1
x = 2.5*e^-7
x = 2.5*e^-7
| 18y^2-37y-20=0 | | 2+.08x=.2x+8 | | Z2/6-7z/2-12=0 | | 6x^2+43x-15=0 | | 6/7z=3 | | 25a^2+25ac-14c^2=0 | | -6.1c=-24.4 | | 3(a+m)+2(b+n)-3a-2b=0 | | 3x-1=6T+2 | | 23x+98=63 | | p-40=24.76 | | h^2+11h+4=0 | | Log(67)=log(21x) | | 3(a+m)+2(b+n)=3a+2b | | -x+12=6 | | -z+2=13 | | 67=21x | | 4n-6-5n=8-n+7 | | 1/2×-2=2-5/3× | | 21xy/20x | | .16x+.6(x-4)=.01(3x-3) | | t-5+6t=3(3t-3) | | -6(4x-4)+8=-24x+32 | | 5p+3=3(3p-5) | | 2n+59=-4-5n | | -16+5n=-7-6+8n | | -3y/-3=25/-3 | | 7=1/2(-m-5) | | (1-4p)/50.2 | | 24=15-(4z-3) | | 21=-6m+39 | | 5k-6=-31 |