If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( u )
u = 0
u = 0
u = 0
u in (-oo:0) U (0:+oo)
6/u = 1/2 // - 1/2
6/u-(1/2) = 0
6/u-1/2 = 0
6*u^-1 = 1/2 // : 6
u^-1 = 1/12
-1 < 0
1/(u^1) = 1/12 // * u^1
1 = 1/12*u^1 // : 1/12
12 = u^1
u = 12
u = 12
| 2/a=8/52 | | 6-6(3x+-2)=-66 | | 4/15=20/c | | 20/m=5/4 | | 10/y=3/5 | | x/10=35 | | X/13=24/26 | | 1.00/4.00x=-4.50 | | b=a+12 | | 15/250=x/300 | | 250/300=x/15 | | X^2-X-1806=0 | | (3y+8)(6+y)=0 | | 9d+5=7d+15 | | 3x+52=9x-14 | | 2x+3x+25=0 | | 1/4x-3/8y=-2 | | 3(2/7)*14=46 | | 3(2/7)*14 | | -70.00-2.25x=-182.50 | | y=1/2+3x | | 63y=31(2y+5) | | 32/7*14 | | 15x^3-43x^2-30x+72=0 | | h(t)=-16t^2+128t+0 | | 36x+4y=-44 | | xy-72x+10y=0 | | 2log(x)=log(6x-90)+1 | | 16x^2+50x+100=0 | | 2/7x+3 | | 2/15x=20 | | 2/15x=14 |