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/65+1 = 0
x/65+1 = 0
x/65+1 = 0
1/65*x+1 = 0 // - 1
1/65*x = -1 // : 1/65
x = -1/1/65
x = -65
x in (-oo:-65) U (-65:+oo)
(105*(x/65))/(x/65+1) = 0
(21/13*x)/(1/65*x+1) = 0
21/13*x = 0 // : 21/13
x = 0
x = 0
| 2y+3x=-9 | | 12y+3=19y+15 | | 5y/-2=15 | | -143-x=-12x+121 | | r^2=9r-20 | | y=-6x+-5 | | x^4=162 | | -6z+4+7x=17-34 | | F/5+2=8 | | 8=0.5y | | 3g-g=24 | | 7x-5=8+7x | | -180+12x=54-x | | 10z=5z-9+4z | | y=-6x-5 | | 9/2x=27 | | 2x^2+4x-14=16 | | d=7mn | | -14-8x=-12x+34 | | 7y-6y=31 | | 3x-12=4(x-2) | | (x/65)+1 | | 2/9x=4 | | 11+k=-12 | | (8+2x)*3=4x+12 | | 105*(x/65) | | 3h+14=2h+16 | | r+14=15 | | -79+7x=113-5x | | 17+3x=3+7x | | 4p+3(p-2)=-2p+30 | | -13-6= |