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)
8/x = 4/5 // - 4/5
8/x-(4/5) = 0
8/x-4/5 = 0
8*x^-1 = 4/5 // : 8
x^-1 = 1/10
-1 < 0
1/(x^1) = 1/10 // * x^1
1 = 1/10*x^1 // : 1/10
10 = x^1
x = 10
x = 10
| 9.7-16.1= | | 8(w+2)-3w=7(w+2)+2(1-w) | | 3b-1=4+2b | | -4+u=8 | | -6x+2x-11=2(2x-3)+4 | | 1.5x+6.5=11 | | x/5+x/9=14/45 | | 7=w+9 | | c/2+7.3 | | 5y-5=7y+2 | | q+r=12 | | 5x+10y=2195 | | w-4.4=7.15 | | 6/7=54/d | | 24/56=n/7 | | X+0.45x=43.5 | | 4/9=36/d | | 9x^2+18=5x^2 | | 7a-17=ya+1 | | x/3-x/2=2/3 | | 35/45=n/9 | | 8c-2+5c=-11+2(c-1) | | -28-6c=-4(5c-8) | | 16-2y/2=3y | | 6/8=d/3 | | 10x+18=8x-12 | | (35-y)y=264 | | t(3t+6)=297 | | 3/10=n/90 | | -5c-16=2c+5 | | (35+-1y)y=264 | | y=36/24 |