If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( t )
t = 0
t = 0
t = 0
t in (-oo:0) U (0:+oo)
22/6 = 55/t // - 55/t
22/6-(55/t) = 0
22/6-55*t^-1 = 0
-55*t^-1 = -11/3 // : -55
t^-1 = 1/15
-1 < 0
1/(t^1) = 1/15 // * t^1
1 = 1/15*t^1 // : 1/15
15 = t^1
t = 15
t = 15
| 5x-(2x+9)=4x-20 | | 10x^2-5=23x | | 4x+2(2x-4)=80 | | x^2*x^3+5x^2+1=x^6+5x^4+x^2 | | 30x^4+38x^3-20x^2=0 | | 7x+15=10(x-7)-3x | | 4n+17=7 | | k=-6/3 | | 2.49+(1.24*p)=11.17 | | 3w-h=9 | | f+g(4)= | | 2x^2-3x=5x | | a+1/3-a-1/5=8/15 | | 80+(b*4)=100 | | Y=a-hx^2+k | | 2z^11*-4z^8*z^4= | | 8/6=m/21 | | Y=ahx^2+k | | 20f+(-8f-15)=3(4f-8) | | (x/2)+(x/3)=2 | | (2x+x)=8x | | 1/2(a-2)=2/3a-6 | | 6x+12=108 | | x/8+3=12 | | 2/-2+5=7 | | 25-m^2=0 | | 1/6x+11/6=-48 | | 6/7*7/9-1/7 | | 4y^3-16x=4x^3-16y | | x/2+3=18 | | Q-2=9 | | 6x^3+3x^2-72x-36=0 |