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)
1/x-(1/7) = 7 // - 7
1/x-(1/7)-7 = 0
1/x-1/7-7 = 0
1*x^-1 = 50/7 // : 1
x^-1 = 50/7
-1 < 0
1/(x^1) = 50/7 // * x^1
1 = 50/7*x^1 // : 50/7
7/50 = x^1
x = 7/50
x = 7/50
| 12=-3(4x-8) | | 6y-10-3y+5=0 | | 92=5k+4(-4k+1) | | 1/4x-7=3/8x | | 2(x-5)=5(x-8)-3 | | 15x^2-64=0 | | 8x-2=9-3x | | 8x+10y=31250 | | (3/12)(16/12) | | y-4=5/3(x-1) | | 24x-16=18/24 | | m=4-4/3-1 | | 2y+60=80 | | cosx^2=cosx | | 5=4x-4/8 | | 47+x=180 | | 1+3y-2= | | 3/2(-2)=1.4 | | N-26=13 | | (6y/5)-(b/5)=(a/4)-(5/4y) | | x^3-8x^2-236x+1008=0 | | x+.06x=19000 | | 3x^3-13x^2+4=0 | | 2x^3-5x^2+0x+1=0 | | x+52*5=44 | | -1/2x(2x-3)^2=0 | | y-1=3/4(x-4) | | 3x^3-13x^2+40=0 | | 1/6x-3=1 | | 4x^2-24x+36=12x-36 | | 6.58-8.36x=3.98x-27.23 | | 0.25x^2-x+1=0 |