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)
7/x = 9/5 // - 9/5
7/x-(9/5) = 0
7/x-9/5 = 0
7*x^-1 = 9/5 // : 7
x^-1 = 9/35
-1 < 0
1/(x^1) = 9/35 // * x^1
1 = 9/35*x^1 // : 9/35
35/9 = x^1
x = 35/9
x = 35/9
| 6.2y+n=(-y+5.3)+(-7.2y-9) | | 5/6(b-6)=10 | | 8(2x-3)=9(x-4)+8 | | 1=sin(-5x) | | 5(x+2)+6(x-3)=25 | | 4(x+2)-29=4x+3 | | x(13-2x)(23-2x)=0 | | 2b-9+1-37=b | | 4(x+2)-29=x+3 | | 10x+4(x-3)=9x-10 | | 6p-6p=1 | | -3.6l=7l+34 | | 3(x-3)+12=3x+10 | | cos^2x+2cosx+1=1-cos^2x | | -5x-(5)=30 | | 2x^2-y+32= | | 2x-9+1-37=x | | v-8-2v=13-4v | | 2x2/-3y*-18y/12x3 | | 26/25 | | -8=x+11 | | 2ln(z+2)-ln(z+6)=0 | | 40a^2=5a | | 72+n^2=30n | | 2b+6=-b | | 0.30x+0.15(140)=0.15(144) | | 16-62=3 | | 27t^2=3t | | -5+3n=n+7 | | 16-62= | | x^2+9x=240 | | -243=-9(10+5) |