If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
16/x = 12-4 // - 12-4
16/x-12+4 = 0
16*x^-1 = 8 // : 16
x^-1 = 1/2
-1 < 0
1/(x^1) = 1/2 // * x^1
1 = 1/2*x^1 // : 1/2
2 = x^1
x = 2
x = 2
| 8+c/-4=12 | | 3y^2=18y | | x-3-4=-7 | | 26=-2(3)+b | | x+(x+780)=2632 | | 42x^2+19x-5=-7 | | 1/(x-5)=3 | | 14x^2+14x=17 | | .777v-5=.555v-3 | | 4n-40=14n+14 | | -7n=-63 | | .777-5=.555-3 | | -4k=-40 | | 4x^2-12+9=0 | | -2r+7+4r=15 | | 12=0.3 | | 12-9+2b-b=-87 | | 4(Y-6)=3Y-5 | | v=t^2-209 | | 2r+7+4r=15 | | x+12-25+4=178 | | -4u=-16 | | x-5=(1/3) | | 8x^2+66x+135=0 | | -m-20+5m=-16 | | x/3+3x=50 | | -m-20+5m=12 | | -32=x/2 | | X/-3=-21 | | 4n-40=-14n+2 | | (x+7)(x+4)=-2 | | y-15=8 |