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+1)/x = (10/2)*x // - (10/2)*x
(4*x+1)/x-((10/2)*x) = 0
(4*x+1)/x-5*x = 0
(4*x+1)/x+(-5*x*x)/x = 0
4*x-5*x*x+1 = 0
4*x-5*x^2+1 = 0
4*x-5*x^2+1 = 0
4*x-5*x^2+1 = 0
DELTA = 4^2-(-5*1*4)
DELTA = 36
DELTA > 0
x = (36^(1/2)-4)/(-5*2) or x = (-36^(1/2)-4)/(-5*2)
x = -1/5 or x = 1
(x+1/5)*(x-1) = 0
((x+1/5)*(x-1))/x = 0
((x+1/5)*(x-1))/x = 0 // * x
(x+1/5)*(x-1) = 0
( x+1/5 )
x+1/5 = 0 // - 1/5
x = -1/5
( x-1 )
x-1 = 0 // + 1
x = 1
x in { -1/5, 1 }
| -7x=10 | | 2+3y=1 | | -x/7=11 | | 0=4x^2+29x+30 | | (6-v)(4v+3)=0 | | Z/2+6=15 | | 5k^2+22k-15=0 | | 26=7f-2 | | 2/384=x/4608 | | 4a^2-8a-5=0 | | 6x^7-28x^6+16x^5=0 | | 8-2x=-2x | | 5-14=6 | | 10+7.5h= | | 5w-6=m | | 7x^2-30x-25=0 | | 6x^7-28x+16x=0 | | 0=-3x^2-14x+24 | | 9x-56=-26 | | 3775=3c+8a+5x | | 2x+0=-12 | | (7z-3)(7z-3)= | | (7x-3)+127=180 | | -2+14=12x-3-11x | | 2t-3=y | | 3p^2-3p=126 | | 8-0.50y=-6 | | 2x^2+11x+13=0 | | (m+2)+3= | | 5+3x-5=(x)x | | x-1/2=-5/6 | | 4+5y=-11 |