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 = x+3 // - x+3
4/x-x-3 = 0
4*x^-1-1*x^1-3*x^0 = 0
(4*x^0-1*x^2-3*x^1)/(x^1) = 0 // * x^2
x^1*(4*x^0-1*x^2-3*x^1) = 0
x^1
4-x^2-3*x = 0
4-x^2-3*x = 0
DELTA = (-3)^2-(-1*4*4)
DELTA = 25
DELTA > 0
x = (25^(1/2)+3)/(-1*2) or x = (3-25^(1/2))/(-1*2)
x = -4 or x = 1
x in { -4, 1}
x in { -4, 1 }
| 2x+7y-y-x= | | ax-bx=8 | | 5m+6n+2m-n= | | 6y-10-3y+8=0 | | 3x+3=0.5x-2 | | -6v+13=1-8v | | 12+8q=13+7q | | -2=-x-2 | | -6+13=1-8v | | 5x+15+5y=10x | | -2x+8x+7y=49 | | -x/2=20 | | -4=-x-2 | | 4(70-2y/3)+3y=300 | | 3(5)=6(x+3) | | 4x+3y=300 | | 3z^2-2x^2=-6y | | 4(2x+7)=2x+25+3 | | 3x+2y=210 | | 3a+3a= | | x(4x-5)-(2x-7)(3x+2)= | | -x+4=2x+4 | | 2x+3=1-6(x-1) | | (2a^1/4)^3 | | 12x-4-(8x+3)+7x-2=68 | | 2/5w-7/5w=6 | | x^2-18x+48=0 | | -2(x+3)-x-4=-3(x+3)+2 | | 4+98/b=2 | | 16-y=20 | | 7x/3-1=2x | | 96/c=1 |