If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( l )
l = 0
l = 0
l = 0
l in (-oo:0) U (0:+oo)
6/45 = 10/l // - 10/l
6/45-(10/l) = 0
6/45-10*l^-1 = 0
-10*l^-1 = -2/15 // : -10
l^-1 = 1/75
-1 < 0
1/(l^1) = 1/75 // * l^1
1 = 1/75*l^1 // : 1/75
75 = l^1
l = 75
l = 75
| 39=7n-3 | | 6w-2=2w | | 9m^2-73m+8=0 | | 7.3y-5.18=-15.9 | | 12/16=18/h | | 9m^2-72m+8=0 | | cos^2x-3cos+2=0 | | 0.3x+-0.02x+0.2=1.18 | | 2-6x=1-8 | | Log[5](x-7)=log[5](x-3)+1 | | 2k-7=j | | 60=5z-10 | | 5x+6y=300 | | 8x=-11+5x-6 | | -10-4u=-2+10 | | 12m-5=2-5m | | Bv-10=9 | | 9m^2-73x+8=0 | | 400-32x5/9 | | 0.3x-0.2x+0.2=1.18 | | 35=-2c-15 | | 3L+4+1=13+1 | | 92/.75=j/3 | | 99+30m=549 | | -8-4p=-2p | | 5y-1+2(5y-1)=13 | | (2n^4-3)(2n^4+3)= | | 99(m+30)=549 | | -2x+8+10x=8x-8+14 | | 8+4g=3g | | 6x-64=2x+4 | | 3/2=d/12 |