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)
((x^-1)/4)*x^4 = 0
1/4*x^3 = 0 // : 1/4
x^3 = 0
x = 0
x in { 0}
x belongs to the empty set
| 2(50+-2y)+4y=100 | | 700x-0.29=500x+0.67 | | 2x-12y=6 | | 7k-16=15-55k | | 7x+2=11x+10 | | 19(x-1)=0 | | 2(x+12)=15 | | -8-4x=-2x+10+2x | | x+(x+5)+3x=180 | | 5t+3+2t-6t=5+2 | | 41/4-12/3 | | 525=250+55x | | 82-6x=21x+19 | | -11+9=m-3 | | 9.8=10x+2.8 | | 11x+23=6x+2 | | 2/3y=10 | | -7(x-15.6)=-9 | | b-3=xy | | 41-3x=6x+21 | | 2(5-2x)=18-3x | | -2/5x-5/2z | | 1/4(x+1/2)=7/8 | | ax+5=BFORX | | 8x-7-10x-9= | | p(x)=2x-6 | | 5-2x-x=-3x-x+8 | | ax+5=B | | 8x-(6x+5)= | | (1-x)/(x+1)2 | | -3(5-a)=15 | | p=2ac |