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)
-((2*a)/a-6) = 4/a-10 // - 4/a-10
6-(4/a)-((2*a)/a)+10 = 0
6-4*a^-1-2+10 = 0
-4*a^-1 = -14 // : -4
a^-1 = 7/2
-1 < 0
1/(a^1) = 7/2 // * a^1
1 = 7/2*a^1 // : 7/2
2/7 = a^1
a = 2/7
a = 2/7
| 5a-18=27 | | (5zy)(-4z)= | | 32+3x=36 | | 9p-4=77 | | 4x^2+16x=24 | | -5n+1-2n+n-4=5 | | 5x+9+3y+8=180 | | y^2+8y+11=0 | | 4w-7=17 | | 200=7(5-4b)-5b | | 5x+4(4x+8)=10 | | 5x+9+3y+8=108 | | -3n-8(1+7)=-8 | | 6(6-w)+3=-3(w-3)-11 | | 19-(-18)-(-14)= | | t*2t=0 | | 22+2x=0.5 | | X-3(-3x+12)=14 | | F(x)=2x^3-10x^2-8x-40 | | 10s-13=8s-10 | | 8k+5=77 | | 1/2n-16 | | s(2)fors(t)=t^2-3t+1 | | 3x=3/7*7/3 | | 46-3x=10-7x | | -6r-4(5r+9)=12-10r | | d/dx(4e^x)cos(x) | | 4x-4(5x-4)=16 | | 5x-4-3x=-32 | | 7p+4=11 | | N-(-6)=56 | | 1/10=4/5 |