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)
2*(4/x-1) = 8 // - 8
2*(4/x-1)-8 = 0
2*(4*x^-1-1)-8 = 0
2*(4*x^-1-1)-8 = 0
8*x^-1-10 = 0
8*x^-1-10 = 0
8*x^-1 = 10 // : 8
x^-1 = 5/4
-1 < 0
1/(x^1) = 5/4 // * x^1
1 = 5/4*x^1 // : 5/4
4/5 = x^1
x = 4/5
x = 4/5
| y+3=4/9(x-3) | | 3(x-5)+7x=45-2(6+3x) | | y-1/x=3 | | 8=0.5(14+10) | | 3x-2xy=1 | | 17=4(a-2)+29 | | 14x=0.5(20x) | | x-4(3-6)=90 | | 13=0.5(4x-10+3x+8) | | 10=0.5(3x-1+7x+1) | | 7/3(2x-1)=1/5x+2/5(4-3x) | | 5/f=3/6 | | 8=0.5(10+AC) | | -7(0.1x-0.2)-0.9=-0.2 | | -15+5y=45 | | 3x^2+13x-10/3=0 | | 128-34+4=x | | 9x^2+39x-10=0 | | 24-8x=3 | | 55x+65y=420 | | 2-2/3x=1/4 | | y-2.5=0.75 | | y-2/3=7/8 | | 100(0.60(x+80))=0 | | 37/8(n-4/3)+1/2(2n+10/3)=-81/8 | | 53/8-23/4 | | -9=4n+3 | | 12=-x-12 | | 3/8+1/8 | | 7=m/4-1 | | 2/3x+4=10-5/6x | | -(2x-3)=9 |