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)
12/x = 37 // - 37
12/x-37 = 0
12*x^-1 = 37 // : 12
x^-1 = 37/12
-1 < 0
1/(x^1) = 37/12 // * x^1
1 = 37/12*x^1 // : 37/12
12/37 = x^1
x = 12/37
x = 12/37
| 37+a=-15 | | x+7-10x-1=6 | | A=(3400t)+600 | | ln(x-3)+ln(x+4)=3ln*2 | | 20n+20(2n)=480 | | 3=3(5x-9) | | ln(x+3)-lnx=0 | | (2/3x)-9=3 | | 4x8/9 | | 20a+20b=480 | | 3x+6y-9z=3 | | 20x(4-x)=80+2x+15 | | m=-1/5-5/-3 | | 5/3-(7-3x)/4=x/2 | | 10p=-20 | | 2x(3+a)*(4*a)= | | b+ax=5a | | (y/8)=4 | | x+(-92)=-140 | | m=-8/3-2/9 | | 4/3=14/6x+1 | | X+8y=49 | | 5+3y=12y+23 | | -16x+2+18x= | | (-x+1)*(-3-4a)= | | b+ax=5x | | -63=-14+r | | -(3x*2)*(2*x)= | | a*(4*b)= | | 5(x-2)=-10 | | -5t^2-7t+34=0 | | 3+3D+2=3D |