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^2-1 = 0
x^2-1 = 0
x^2-1 = 0
1*x^2 = 1 // : 1
x^2 = 1
x^2 = 1 // ^ 1/2
abs(x) = 1
x = 1 or x = -1
x in (-oo:-1) U (-1:1) U (1:+oo)
(16-16*x)/(x^2-1) = 0
16-16*x = 0 // - 16
-16*x = -16 // : -16
x = -16/(-16)
x = 1
x in { 1}
x belongs to the empty set
| 4y-2/3=2y-2 | | 155.63=150r^4 | | 9x+2y=-42 | | -.5+3= | | -27x+2y=-66 | | -30x-(-2x)= | | 10y/9=2y-5 | | 6*-12-7*-12= | | -7(4x+y)+7y= | | 2(-2-5)= | | -5m=-30 | | 2(1-5)= | | 12x+3=13-5x | | n/4-9=5 | | 6q-(q-2)=3q+2(q+1) | | -30+(2x)= | | 4x-22=30 | | 3*9+3= | | z+8=9z-7 | | 0.35x+0.30(270-x)=85 | | 76-14c=36 | | 2x+4=27 | | 3/7d=12/35 | | 4x-22=27 | | 12x+-3y+x+2y= | | 4(x-2)=10+2(3x+1) | | 5a=8a | | 0.2x+4.8=0.1x+1.6 | | 9y+20=4y-20 | | c/4+7=5 | | 10x^4-6x^2=0 | | 2x+3=13-x |