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)
(5/9)/t = 1/5 // - 1/5
(5/9)/t-(1/5) = 0
(5/9)/t-1/5 = 0
5/9*t^-1 = 1/5 // : 5/9
t^-1 = 9/25
-1 < 0
1/(t^1) = 9/25 // * t^1
1 = 9/25*t^1 // : 9/25
25/9 = t^1
t = 25/9
t = 25/9
| 1.4(2-x)-0.5(2x-4)=0 | | 16y+8=16y+8 | | 2t-4t=7 | | 20+2y=-20 | | 120=(-30)-5x | | 16x=1/4x-5 | | 5/x-1=10/x-9 | | 5x+6x+(160-4x)=300 | | 7[x+9]=7x+63 | | 4/d=45/15 | | x=100+1x | | 3x^2-9xy-30y^2=0 | | 5/6x-5=-4 | | x=100+2.0x | | 7[x+9]=16x-63 | | 7[x+1]=7x-9 | | -12+2y=-12 | | 185+90+25=180 | | 7(x-7)=7x-14 | | 9a^3+66a^2-48a=0 | | 4/3t=9/8 | | 12y+6=10y+10 | | (b+3)(b+2)=0 | | 11x^2+12x+9=0 | | 8(X-4)=12x+32 | | -1(11x^2+12x+9)=0 | | 3ax^2+16ax+21a=0 | | (2x+8)(x+10)=0 | | (p-7)(p+8)=0 | | 3(2x^2+x-10)=0 | | 8(x-1)=8x+4 | | y=-5x-10x-13 |