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)
196/x = 1/4 // - 1/4
196/x-(1/4) = 0
196/x-1/4 = 0
196*x^-1 = 1/4 // : 196
x^-1 = 1/784
-1 < 0
1/(x^1) = 1/784 // * x^1
1 = 1/784*x^1 // : 1/784
784 = x^1
x = 784
x = 784
| 4-36x-12=15x-40 | | x^4+x^7+x^9+x^10= | | 2(x-3)=-(y-1) | | s^2+5s=-15 | | x=4+6-4 | | 6a+18=4a-4 | | 2x+42-3x=2-8x+5 | | 5(x+1)=2(x+4) | | 2w+2h+3L=P | | x^2-mx-8=0 | | 3097.50=3000(1+0.5r) | | y+4=-5(x+1) | | 4n+14=78 | | 4p+2q=1 | | y-7=5(x-8) | | 1/17a=0 | | 5x-1x=28 | | 3e-5=14 | | 3=-3+36 | | 2x^2-14x-24=0 | | 2F+5G=13.2 | | 18-11x=73 | | -2x-1.5(4-x)=20-3x | | 15-5x=14x-14 | | 4z+8=3 | | 3x-8=(-x)-8 | | (8x-1)+(7x+9)= | | 6x-9=-21 | | 7x^6+30x^4+2=0 | | -2-4=-2(X+3) | | 6(x-4)=3(2x+5)+9 | | -4x+5=-x-6-3x |