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)
(x-10)/7+2/x = -1/x // + -1/x
(x-10)/7+2/x-(-1/x) = 0
(x-10)/7+2/x+x^-1 = 0
(x-10)/7+2/x+1/x = 0
(x*(x-10))/(7*x)+(2*7)/(7*x)+(1*7)/(7*x) = 0
x*(x-10)+2*7+1*7 = 0
x^2-10*x+7+14 = 0
x^2-10*x+21 = 0
x^2-10*x+21 = 0
x^2-10*x+21 = 0
DELTA = (-10)^2-(1*4*21)
DELTA = 16
DELTA > 0
x = (16^(1/2)+10)/(1*2) or x = (10-16^(1/2))/(1*2)
x = 7 or x = 3
(x-3)*(x-7) = 0
((x-3)*(x-7))/(7*x) = 0
((x-3)*(x-7))/(7*x) = 0 // * 7*x
(x-3)*(x-7) = 0
( x-3 )
x-3 = 0 // + 3
x = 3
( x-7 )
x-7 = 0 // + 7
x = 7
x in { 3, 7 }
| 5+7x=-16 | | 84-2x=10x-24 | | 9x+32=113 | | (x+4)*(x+1)*3= | | x^2-kx+8=0 | | 1/x+1/(x+1)=7/12 | | 2x^2-10+5=0 | | (x+2)/2x-(x+1)/4=-1/2 | | 4(6y-4)=16y | | 22x=-44 | | 2a+9=21 | | 1/5x+9/4=8 | | 1/5x+9/4=8 | | 7x+14=49 | | 2x^2/5+3x=10 | | 3x-3y-8x+y=0 | | 5x+2=11-8x | | 2x+10=-30 | | x(3x-32)+12=-52 | | z-16=z/-9 | | x^2+6x=-19 | | y^2-5y-3y+15= | | 50h+250=600 | | 3n^2-7n-3=0 | | 1/x+1/x+1=7/12 | | (5x/7x-y)+(4/y-7x) | | 44b^2-324b-224= | | 1/9x=5 | | 19x^6-4x^4+7x^3= | | 12-(4x-18)=(36+4x)+(18-6x) | | 4.15x0.009/0.11 | | 8x^2+41x+5= |