If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( v )
v = 0
v = 0
v = 0
v in (-oo:0) U (0:+oo)
21 = 37/v // - 37/v
21-(37/v) = 0
21-37*v^-1 = 0
-37*v^-1 = -21 // : -37
v^-1 = 21/37
-1 < 0
1/(v^1) = 21/37 // * v^1
1 = 21/37*v^1 // : 21/37
37/21 = v^1
v = 37/21
v = 37/21
| x^2+(-2x)+3=0 | | 17.6x+0.83=92 | | 3h-2.5+4.5=26.5 | | 45+39.75x=164.75 | | -5p-8.5+7p=16.5 | | 2(x-3)=-5y | | (2+3x)=(1+3x) | | C(100)=10+250 | | x^4-2(x^2)-1=0 | | -10(8r+9)+8r=414 | | 2x-4=50x | | (-2)(-1)= | | A+2a=50 | | X-3=5.29 | | x=-5y+20 | | -6+7w=3(w+6) | | (x-2)*x+(-3)(-1)=0 | | 6x+2x-3x=9 | | 3(1-r)=3-3r | | x^5-2x^4+2x^3-4x^2+x-2=0 | | 2x-4/5=10c | | 360-96=x | | 9+6(10-7x)= | | 8p+-21= | | 0.5(2x-6)=14 | | 2b+0.8=5.4 | | 5k^2+100=80 | | 180°(13-2)/2 | | 10-3(y-2)+12y=45 | | 6x-2x-3x=9 | | -3xy+4xy-7yx+8+6x= | | 6.0b=32 |