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)
1440/x = 90 // - 90
1440/x-90 = 0
1440*x^-1 = 90 // : 1440
x^-1 = 1/16
-1 < 0
1/(x^1) = 1/16 // * x^1
1 = 1/16*x^1 // : 1/16
16 = x^1
x = 16
x = 16
| 6x+28=4x | | 12/-4 | | 144/x | | -4x^6-24x^5+6x^4= | | 3(1/2)-2y=27 | | 7a-6b-5c=3 | | 3(a-6)=6a-(3a+18) | | -23/24-19 | | 12.5x-20.25=98.5 | | -4x-23/6 | | 221-3x=33x+21 | | 8+8q=11+7q | | =log(x+4) | | 37=-3+5(x-6) | | -7x^6-14x^5+56x^4= | | 5-8x=130-43x | | f(x)=log(x+4) | | 2.4(-3/2^2-1/2) | | 27x^2-54x=0 | | 165=50+12(m) | | 5x+0.7=2.7 | | 4=2x+6+3x | | 6(-35/36)+2 | | 2x=12.4 | | 4x+(3x+40)=180 | | a^7+6a^6d-7a^5b^2= | | 3x=y+14 | | 4x+(3x+40)=90 | | -58-8x=10x+19 | | 5x+12=6x-10 | | 3x+10=82-62 | | a^5+6a^4b-7a^3b^2= |