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)
(1/5)*(100-x) = 0
1/5*(100-x) = 0
100-x = 0 // - 100
-x = -100 // * -1
x = 100
x = 100
| -3q=3q+24 | | x^2=4x-16 | | 8-12=N | | 2x+3y+4z=d | | 1.8x+32=59 | | H=-5t+25t+120 | | 7y-2=3y+10 | | 0.4(6x+9)=0.7-(x-3) | | 6(m+8)=90 | | (2b-3)(3b-8)=8 | | 3x+x=108 | | 2x+30=59 | | 25x+5y=175 | | 3z=2.6+0.7 | | 0.8(3x+8)=3.5-(x-3) | | 4x(2-3x)=0 | | -0.4=-0.7u+0.6u | | 9/5x=32=59 | | log(x)+log(3x+2)=3 | | Y=15x^2+3x | | 21x^2-181x+50=0 | | log(x)+log(x-11)=log(12) | | X^4-2x^3+24x^2+18x+135=0 | | 4p-1p+8=2p+-3 | | -4/5x(9x-20)-3x=4/5x-6 | | r/10=10 | | 3.7x+47.5=14.7-12.7x | | ((5/x)-(3/4x))/((4/7x)-(1/x)) | | r/10 | | 3x+12+3x=6x-8-2x | | (5/x)-(3/4x)/(4/7x)-(1/x) | | -34+16=-2x+8x |