If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
6-x = 0
36-(6*x) = 0
x-3 = 0
6-x = 0
6-x = 0
6-x = 0 // - 6
-x = -6 // * -1
x = 6
36-(6*x) = 0
36-(6*x) = 0
36-6*x = 0
36-6*x = 0 // - 36
-6*x = -36 // : -6
x = -36/(-6)
x = 6
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x in (-oo:3) U (3:6) U (6:+oo)
(1/(36-(6*x)))/(6-x)-(1/(x-3)) = 0
(1/(36-6*x))/(6-x)-(x-3)^-1 = 0
1/((36-6*x)*(6-x))-1/(x-3) = 0
(1*(x-3))/((36-6*x)*(6-x)*(x-3))+(-1*(36-6*x)*(6-x))/((36-6*x)*(6-x)*(x-3)) = 0
1*(x-3)-1*(36-6*x)*(6-x) = 0
73*x-6*x^2-219 = 0
73*x-6*x^2-219 = 0
73*x-6*x^2-219 = 0
DELTA = 73^2-(-219*(-6)*4)
DELTA = 73
DELTA > 0
x = (73^(1/2)-73)/(-6*2) or x = (-73^(1/2)-73)/(-6*2)
x = (73^(1/2)-73)/(-12) or x = (73^(1/2)+73)/12
(x-((73^(1/2)-73)/(-12)))*(x-((73^(1/2)+73)/12)) = 0
((x-((73^(1/2)-73)/(-12)))*(x-((73^(1/2)+73)/12)))/((36-6*x)*(6-x)*(x-3)) = 0
((x-((73^(1/2)-73)/(-12)))*(x-((73^(1/2)+73)/12)))/((36-6*x)*(6-x)*(x-3)) = 0 // * (36-6*x)*(6-x)*(x-3)
(x-((73^(1/2)-73)/(-12)))*(x-((73^(1/2)+73)/12)) = 0
( x-((73^(1/2)+73)/12) )
x-((73^(1/2)+73)/12) = 0 // + (73^(1/2)+73)/12
x = (73^(1/2)+73)/12
( x-((73^(1/2)-73)/(-12)) )
x-((73^(1/2)-73)/(-12)) = 0 // + (73^(1/2)-73)/(-12)
x = (73^(1/2)-73)/(-12)
x in { (73^(1/2)+73)/12, (73^(1/2)-73)/(-12) }
| 1/(36-6x)/(6-x) | | (25a^2)/(a-b)^2/(5a)/(a-b) | | ((25a^2)/(a-b)^2/(5a)/(a-b)) | | x:3/4=5 | | 9x+24y=8 | | x=35/? | | 1/2log(4) | | 6x+5=2x+171 | | 3x+5=x-33 | | 4p+5q+2p-3q= | | 2/3x-16=100 | | 4(2k+3)=16 | | Sinπ/2 | | 5x^2+14x-20=0 | | -x^3+x-4=0 | | f(x)=-8x^3-3x^2+4x-3 | | 263+32x-24x=-225+3x-5 | | 1.3-2.5yi=x-5i | | 3a+2c=168 | | x^2-20x+x+95=0 | | log32=-1/5 | | x^2+15x-3250=0 | | -4(x+4)+4=6(x+3)+4 | | -3(x+4)+4=5(x+2)+4 | | 37=3x^2-3x+1 | | 7=3x^2-3x+1 | | 19=3*x^2-3*x+1 | | 4-9/4 | | 4(x-7)+14=2(x-5) | | x+x(0.20)=316250 | | 1/3x-4=2/43(3x-2) | | 3x-7(7-x)=3 |