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)
2-(7/x) = 2/5 // - 2/5
2-(7/x)-(2/5) = 0
2-7*x^-1-2/5 = 0
-7*x^-1 = -8/5 // : -7
x^-1 = 8/35
-1 < 0
1/(x^1) = 8/35 // * x^1
1 = 8/35*x^1 // : 8/35
35/8 = x^1
x = 35/8
x = 35/8
| 4=4y-1 | | 3(q-12)=12 | | X^2-2ax-4x+a^2+4a+3=0 | | 258*27= | | 16=10y-5y-4 | | 66=4m-17m | | V/3-1=1 | | .33x+1=4 | | 2+4R=14 | | x(x^2+4x-10)-4=0 | | 2x+3y=18fory | | 4V+4(V+10)=-2V-29 | | y=2x^3+x-3 | | x+9squared= | | 4(j+14)=12 | | 5.5x+2y-158=0 | | 4u-2=14 | | 1/3x-2/3=-13 | | 75=x/3 | | 4x+8=7.2+5d | | 1/3x=2=5 | | 8n-2+2=34+4 | | ln(20/0) | | 8x-12=2(5x+6)-4 | | 2.5/3=10/12 | | 10x+9x=10+10 | | -6y+4=4(b-7) | | 6x-3-5=10 | | 43x+18=6x+117 | | 16-5x=-8x+7 | | 25-x=15(-3x+10) | | 8/20=x/15 |