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-4 = 0
x-4 = 0
x-4 = 0
x-4 = 0 // + 4
x = 4
x in (-oo:4) U (4:+oo)
1000 = 10000/(x-4) // - 10000/(x-4)
1000-(10000/(x-4)) = 0
1000-10000*(x-4)^-1 = 0
1000-10000/(x-4) = 0
(1000*(x-4))/(x-4)-10000/(x-4) = 0
1000*(x-4)-10000 = 0
1000*x-14000 = 0
(1000*x-14000)/(x-4) = 0
(1000*x-14000)/(x-4) = 0 // * x-4
1000*x-14000 = 0
1000*x-14000 = 0 // + 14000
1000*x = 14000 // : 1000
x = 14000/1000
x = 14
x = 14
| -2-(5-17)+(-16)= | | 1000-10000/(x-4) | | -28+(-15)-7= | | 32x-48=30x-42+2x-6 | | .25(x-30)=30 | | .25(x-30)=15 | | 0.05x+0.03(x+5)=1.25 | | (X+4)+(3x+2)=90 | | P=20 | | 8x^2+7n-15=-7 | | 8=y-21 | | .5(x+150)=525 | | .5(x+150)=275 | | 3(2y-2)-4(y+6)=3y+8+y | | t-49=-15 | | 3(5-p)=-(3+p) | | .5(x+150)=270 | | 0.4x-0.3(x-3)=1.5 | | s=14p | | (4x-3)+(6x+11)=88 | | 5r-95= | | 4(-2)z+8(2)+3(-2)+6= | | -1-2e=21 | | y-11y+24=0 | | .10(x+80)+.20x=20 | | .5(x-14)=11 | | .5(x-14)=1 | | 13=y-22 | | 80-3x=29 | | 2p-1/3q=8 | | 17-9/4=-10 | | 2x+16=64 |