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)
4/x = (13/4)*x+3 // - (13/4)*x+3
4/x-((13/4)*x)-3 = 0
(-13/4)*x+4/x-3 = 0
4*x^-1-13/4*x^1-3*x^0 = 0
(4*x^0-13/4*x^2-3*x^1)/(x^1) = 0 // * x^2
x^1*(4*x^0-13/4*x^2-3*x^1) = 0
x^1
(-13/4)*x^2-3*x+4 = 0
(-13/4)*x^2-3*x+4 = 0
DELTA = (-3)^2-(4*4*(-13/4))
DELTA = 61
DELTA > 0
x = (61^(1/2)+3)/(2*(-13/4)) or x = (3-61^(1/2))/(2*(-13/4))
x = -2/13*(61^(1/2)+3) or x = -2/13*(3-61^(1/2))
x in { -2/13*(61^(1/2)+3), -2/13*(3-61^(1/2))}
x in { -2/13*(61^(1/2)+3), -2/13*(3-61^(1/2)) }
| 8=k+7-6 | | 3x-17=28 | | 8v^2-8v-12=0 | | 2v+4=8 | | 2n+12=30 | | 8v^2-12=8v | | 8c+-24=8 | | 3c-7=10 | | 7x-y-8=0 | | 0=-4x*5x | | 4y=x+Y^2 | | N/-1=31 | | 18=(-5b)-(17) | | -10/x=-16/x-3 | | 391-4x=153 | | 15/24=t/10 | | 37+22= | | 180=-16t+120t^2 | | y=2/3x+1 | | g/g+47=64 | | 4k(3m)= | | A=-16t+120t^2 | | -24=1+4x+x | | 4k(a)= | | x=-y^2+4Y | | (x-1/3)+2 | | 128/2 | | 4k(2c)= | | 5x-3(2x-8)= | | -9-17=-26 | | 2(7c+3)=3(6c-2) | | 4p/6+27=34 |