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)
3/x = 9/15 // - 9/15
3/x-(9/15) = 0
3/x-3/5 = 0
3*x^-1 = 3/5 // : 3
x^-1 = 1/5
-1 < 0
1/(x^1) = 1/5 // * x^1
1 = 1/5*x^1 // : 1/5
5 = x^1
x = 5
x = 5
| x+2y-38=0 | | 6(2y-1)=3(y-2) | | 31/(x+4)=2 | | x^3-9x-16=0 | | 5/3*25/9 | | 7k^2+21k=280 | | r^2=2r+35 | | 2m^2-8=-6m | | -(4-5x)=11 | | 3x-9x-2=0 | | 3*2+4-3*6= | | x^5-20x^2+64=0 | | 12(x/6+x/2)=12(5/12) | | x/8+x/2=5 | | 3x-4/2=8 | | 5z-3/2z=8/9 | | 11(r+4)=4(r+10) | | 2(n-12)=9(n-11) | | x-6/32 | | 10+3x+-7=7x+8+-6x | | 10+3x-7=7x+8-6x | | 3(8-6x)=-26-8x | | -7-7n=-7(2n-8)-7 | | 2(1-8x)=-8x-38 | | -17+n=-29 | | 7x^3-15x^2+8x+2=0 | | v-8=-5 | | 2x+7/5-3x-11/2=2x+8/3-5 | | 5(h+2)=3(8-1) | | 2ln(x+1)=ln(2x) | | a/20n+4/15=-9/15 | | 7x-5+x+z+y+84+5x+3=360 |