If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
2*(((-1/2)*e^-x)/2) = 0
((-1/2)*e^-x)/2 = 0
((-1/2)*e^-x)/2 = 0 // * 2
(-1/2)*e^-x = 0
-1/2 = 0
-1/2 = 0
x belongs to the empty set
e^-x = 0
x naleu017Cy do O
(-1/2)*e^-x = 0 <=> -1/2 = 0 or (-1/2)*e^-x = 0 <=> e^-x = 0
2*(((-1/2)*e^-x)/2) = 0 <=> 2 = 0 or 2*(((-1/2)*e^-x)/2) = 0 <=> ((-1/2)*e^-x)/2 = 0
x belongs to the empty set
| 2+4w=6 | | 28=5x-7 | | 4(2x-1)-5=59 | | 8x^3-16x^2+12/-2x | | 10m-3=2m+17 | | 2(3y-1)=4(5-2y) | | t/7+3=8 | | 3x+yi=5x+1+2i | | 6t+t= | | 9x^3-6x^2+1=0 | | 256.36=(1691)(271/360)*r | | sqrtx=5-x | | 3z+17+12z=11 | | rx=5-x | | 3x+3x/5=6+x/2+1/5 | | 5g-4+2g+3= | | 2(c+7)= | | 3y^2-2y-5= | | 5/12(7+x)=7/18(x+8) | | 1=5x+4x | | 6(y+5)=48 | | 2x+2/x-2=8 | | x=-6/25*(y+5) | | 0=6x^2-5x+1 | | y=-5-25x/6 | | x^4-4x^2+15=0 | | 10x^2+10x-60= | | 4y=x+28 | | lnx^2-lnx=0 | | 9x+2/4 | | 12x+14=4x+206 | | 252-6x=39x+22 |