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)
3/x+4/x-1 = (2/3)*x // - (2/3)*x
3/x-((2/3)*x)+4/x-1 = 0
(-2/3)*x+3/x+4/x-1 = 0
7*x^-1-2/3*x^1-1*x^0 = 0
(7*x^0-2/3*x^2-1*x^1)/(x^1) = 0 // * x^2
x^1*(7*x^0-2/3*x^2-1*x^1) = 0
x^1
(-2/3)*x^2-x+7 = 0
(-2/3)*x^2-x+7 = 0
DELTA = (-1)^2-(4*7*(-2/3))
DELTA = 59/3
DELTA > 0
x = ((59/3)^(1/2)+1)/(2*(-2/3)) or x = (1-(59/3)^(1/2))/(2*(-2/3))
x = -3/4*((59/3)^(1/2)+1) or x = -3/4*(1-(59/3)^(1/2))
x in { -3/4*((59/3)^(1/2)+1), -3/4*(1-(59/3)^(1/2))}
x in { -3/4*((59/3)^(1/2)+1), -3/4*(1-(59/3)^(1/2)) }
| X+2/3=9/10 | | 4.9=30-k/16 | | 9x-4=4x-4-5x+4 | | X-7-2=x-16 | | 8n+1/2=-31/2 | | x=3/x+1/2 | | 2y-5=-37 | | 5y^2-8=-7y | | 7(8x-5)=-91 | | 3y+8y-4+7-2y= | | 5x^2+2x=-6 | | 9x-(3x+3)=2x-11 | | 10.75=.66x-6x-8 | | 11j-8.8=132 | | 1/4x+12=-1/4x | | 3(2y)-(y+1)=6 | | 12+v=6+7v | | 21=5r+6 | | 3/4a=1/2 | | n^2-n-56=1 | | 6x-2y=-14 | | 21=5r | | 30x+40y=745000 | | 4n-2.75=-22.75 | | x-9^1/2=4 | | 2/1+x-1/x=4/x | | 1/3w+1/4z-3/6w+7/8w-4/8z | | 2.34/0.12 | | 2/5-3/4 | | 15x+15/15x+60*5x+20/3x^2-3 | | 18(v+1)-2v=4(4v+3)-17 | | x/6+7=31 |