If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
12*x-12 = 0
4*x-5 = 0
12*x-12 = 0
12*x-12 = 0
12*x-12 = 0 // + 12
12*x = 12 // : 12
x = 12/12
x = 1
4*x-5 = 0
4*x-5 = 0
4*x-5 = 0 // + 5
4*x = 5 // : 4
x = 5/4
x in (-oo:1) U (1:5/4) U (5/4:+oo)
x/4-((x^2-(8*x))/(4*x-5)) = 1/(12*x-12) // - 1/(12*x-12)
x/4-((x^2-(8*x))/(4*x-5))-(1/(12*x-12)) = 0
x/4-((x^2-8*x)/(4*x-5))-(12*x-12)^-1 = 0
(-1*(x^2-8*x))/(4*x-5)-1/(12*x-12)+x/4 = 0
(-1*4*(x^2-8*x)*(12*x-12))/(4*(4*x-5)*(12*x-12))+(-1*4*(4*x-5))/(4*(4*x-5)*(12*x-12))+(x*(4*x-5)*(12*x-12))/(4*(4*x-5)*(12*x-12)) = 0
x*(4*x-5)*(12*x-12)-1*4*(x^2-8*x)*(12*x-12)-1*4*(4*x-5) = 0
48*x^3-48*x^3+432*x^2-108*x^2-400*x+60*x+20 = 0
324*x^2-340*x+20 = 0
324*x^2-340*x+20 = 0
4*(81*x^2-85*x+5) = 0
81*x^2-85*x+5 = 0
DELTA = (-85)^2-(4*5*81)
DELTA = 5605
DELTA > 0
x = (5605^(1/2)+85)/(2*81) or x = (85-5605^(1/2))/(2*81)
x = (5605^(1/2)+85)/162 or x = (85-5605^(1/2))/162
4*(x-((85-5605^(1/2))/162))*(x-((5605^(1/2)+85)/162)) = 0
(4*(x-((85-5605^(1/2))/162))*(x-((5605^(1/2)+85)/162)))/(4*(4*x-5)*(12*x-12)) = 0
(4*(x-((85-5605^(1/2))/162))*(x-((5605^(1/2)+85)/162)))/(4*(4*x-5)*(12*x-12)) = 0 // * 4*(4*x-5)*(12*x-12)
4*(x-((85-5605^(1/2))/162))*(x-((5605^(1/2)+85)/162)) = 0
( x-((5605^(1/2)+85)/162) )
x-((5605^(1/2)+85)/162) = 0 // + (5605^(1/2)+85)/162
x = (5605^(1/2)+85)/162
( x-((85-5605^(1/2))/162) )
x-((85-5605^(1/2))/162) = 0 // + (85-5605^(1/2))/162
x = (85-5605^(1/2))/162
x in { (5605^(1/2)+85)/162, (85-5605^(1/2))/162 }
| 7x+21.2= | | 56=9m-7 | | -3=-40 | | 1=i-13 | | 5.2k+81.9=57.2 | | f(x)=p-3x | | -2v^2-v+12=13v^2+6v | | 3.8-x=5.2 | | -6y+4=4(2y+3) | | X*2+25x=0 | | 2x^2-3x=45.50 | | f(x)=2x^2+9x+5 | | (-x+2)5=(-x-4)7 | | 12x=3+x | | (-x+2)5=(-x-4) | | -27=-5y | | -2-(4-4p)= | | 4x^2-(x^2+25)=0 | | (-x-2)5=(-x-4)7 | | p-9p= | | 9+4x=15-x | | 7+3x-6=9x+1-4x | | (5y+8)-(2+4y)=7 | | y=25x+615 | | 2x^2+2x=5x^2-35x | | 4t+1+4t-7t=4+2 | | x^2-20x+55=0 | | 3v=-28 | | y=4-y | | -3.5+7p=-5.2 | | h=256+1600 | | 2.80x=54+x |