If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( a )
a = 0
a = 0
a = 0
a in (-oo:0) U (0:+oo)
3/a = 9/18 // - 9/18
3/a-(9/18) = 0
3/a-1/2 = 0
3*a^-1 = 1/2 // : 3
a^-1 = 1/6
-1 < 0
1/(a^1) = 1/6 // * a^1
1 = 1/6*a^1 // : 1/6
6 = a^1
a = 6
a = 6
| 4/7=m/35 | | y=3x^3-8x^2-3x+14 | | f(x)=3x^3-8x^2-3x+14 | | 40.7=arcsin(x) | | 5X-85=110 | | 40.7=sin(x) | | 12w-6x= | | 4x*(1000/x^2) | | iz^2+2z+3i=0 | | 7x^2+22x+4=7 | | -0.012x^2+4.2x-30=0 | | 5/3*x=120 | | 32cos(16x)sin(16x)=0 | | 7n-32=3 | | 24+23x=4x | | 8+8x=-24 | | 84-xx/2 | | 1.25=(1*x)(1*x)(1*x)(1*x)(1*x) | | (5y/3x)/(25/15x) | | x^2-3x-10=18 | | 5x+9=9-(3x-9) | | 20x+60y=25000 | | (xy/yx)/(2x/2y) | | 20x+60x=25000 | | xy/yx/2x/2y | | log[4](2x-6)=4 | | 4(2x-5)5=11 | | w/5b-1/4b=3 | | 8(2x-3)=56 | | -2x+8=4x-6 | | 3+6ln(x-1)=0 | | 0=6-384/x^3 |