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)
12.25/3.5 = 2.5/x // - 2.5/x
12.25/3.5-(2.5/x) = 0
12.25/3.5-2.5*x^-1 = 0
-2.5*x^-1 = -3.5 // : -2.5
x^-1 = 1.4
-1 < 0
1/(x^1) = 1.4 // * x^1
1 = 1.4*x^1 // : 1.4
0.71428571 = x^1
x = 0.71428571
x = 0.71428571
| 3x-5=-3x | | -6/(3/4) | | 0.5+4.5=2.5 | | -5(x+5)-1=-56 | | -5x/4-2=8 | | 20*42*65*80= | | -7+7k=28 | | 1/2/(-3) | | 5a-18=-4a+9 | | 9+8x=49 | | X-9=2/5x | | 2x-5(x-2)=-2+5x-15 | | 5x-2=6x+1-5x | | y=8(x-3)+4 | | 1-2xy+2y=0 | | -0.1+3.5= | | 8x^2+18x-25=0 | | x-39=24 | | 5x(2x-6)(-4x-12)=0 | | 3.5-3.6= | | 9x-8=x-2 | | 3n=11.0 | | 3.4*3.5*3.6*7.0= | | 10d-50=8d-30 | | 5(x-1)-9=11 | | 6,5x/6,5 | | x-39=23 | | 5.4-5.4= | | 38=50-v | | -0.2+2.4= | | 5x/3-4=-29 | | 3x-5(x+3)=12 |