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)
2/x+4 = x+1/5 // - x+1/5
2/x-x-(1/5)+4 = 0
2/x-x-1/5+4 = 0
2*x^-1-1*x^1+19/5*x^0 = 0
(19/5*x^1-1*x^2+2*x^0)/(x^1) = 0 // * x^2
x^1*(19/5*x^1-1*x^2+2*x^0) = 0
x^1
(19/5)*x-x^2+2 = 0
(19/5)*x-x^2+2 = 0
DELTA = (19/5)^2-(-1*2*4)
DELTA = 561/25
DELTA > 0
x = ((561/25)^(1/2)-(19/5))/(-1*2) or x = (-(19/5)-(561/25)^(1/2))/(-1*2)
x = ((561/25)^(1/2)-19/5)/(-2) or x = ((561/25)^(1/2)+19/5)/2
x in { ((561/25)^(1/2)-19/5)/(-2), ((561/25)^(1/2)+19/5)/2}
x in { ((561/25)^(1/2)-19/5)/(-2), ((561/25)^(1/2)+19/5)/2 }
| 3x+2x-4=5x-7 | | 0=x^2+11x+24 | | -8c+8+6=-3c+13 | | 15=a/3+(-2) | | -18-1x=5x-6 | | 3.5-5y=11 | | 3x^2-2x-3=o | | 10x+16y=588 | | 9/4-3/36x-1/6+1/18x=1-x+3/2 | | 29x-3=15x+7 | | 1x^2+x-6=0 | | 5(y+6)=75 | | 2-5y=11 | | b^2+b-56=0 | | 2x+x-6/2=0 | | 15-3(2+6*-3)= | | 12-b+7b=7b+15 | | 5/6(w-8)=40 | | 0.5*2x-4=-17 | | 2x^4-13x^2-45=0 | | 4m=14 | | 1+0.75y=-6 | | -4×+7×=-15 | | 9x−10=7x+10 | | 6x+7(x+2)=170 | | -4(4x-4)+5x=8+2(2x-2) | | 1x+12=3x-28 | | 3(5)-4y=15 | | (X*X)+12x+152=180 | | (6x-20)+(3x+18)=151 | | 4-d= | | Y+11+3-12Y |