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)
20/4 = 19/a // - 19/a
20/4-(19/a) = 0
20/4-19*a^-1 = 0
-19*a^-1 = -5 // : -19
a^-1 = 5/19
-1 < 0
1/(a^1) = 5/19 // * a^1
1 = 5/19*a^1 // : 5/19
19/5 = a^1
a = 19/5
a = 19/5
| 25c+17=5c-143 | | 68=3 | | 4x+8=5x-20 | | x-23.4=192.8 | | x+1=-x+4 | | (x^10)^(3/5) | | 8y-x=16 | | 14x-56=77x | | X=3.25+1.75y | | (x^10)^3/5 | | 2-8x=2-8x | | Y-6=1/4(x-2) | | x=-18*5 | | -1*(-2)= | | 7n^2-n=15 | | x+.05x+.02x=10 | | 80-v=12 | | X^2=16/7 | | (7x-10)=6(3x-5) | | y-12=3(x+5) | | 2x+8=8+3+x | | 64=2(m+11) | | -6m(m+4)-8m=-6m+32 | | 5x+5+5x+51=10x-84+10+100 | | -10+13x=16x+11 | | Y=-6x+50 | | 7(u+6)+3=80 | | 8=26+14y | | 900x*1/3x | | 70=5(p+4) | | 4x+50=450 | | 2(s+1)=-8 |