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)
80/u = 2 // - 2
80/u-2 = 0
80*u^-1 = 2 // : 80
u^-1 = 1/40
-1 < 0
1/(u^1) = 1/40 // * u^1
1 = 1/40*u^1 // : 1/40
40 = u^1
u = 40
u = 40
| -7k+10=9k+8 | | 5/2-1-x=-4/7+2 | | x-5/9=5/6 | | 5.08x+20.32=40.64 | | 9=7x-6-3x | | 1/2x-3/4x=3/2x-5/2 | | 20+16y=-10y+5 | | -15=k-12 | | (1/5)x+3=4 | | 5+2/3(3m-6)=11 | | 7(-14)+2[2(1-(-14))-2(1+(-14))]=14 | | 7*h=14/33 | | 1/3r-9/4r=161/72 | | d=a+g(n-1) | | 6.8a+12=86.8 | | 3y^2-13y+14=0 | | 6xn=35 | | 7*h=14 | | 3x+4=8x+6 | | 4u-10=-2(u-7) | | 4.9x+1.7x=5.94 | | -73+2x=-7x+53 | | x+(-3)+50=-45 | | 7/h=14 | | 9y+36=12x | | 7(-14)+2[2(1-(-14))-2C(1+(-14))]=14 | | 2x-2=.60(10+5x) | | 91/4-3/8x9/12 | | 5.1b-4b=.66 | | A=4900 | | 4x+15=r | | 56-x=3x |