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+80 = 0
x+80 = 0
x+80 = 0
x+80 = 0 // - 80
x = -80
x in (-oo:-80) U (-80:+oo)
(x+40)/(x+80) = 0.6 // - 0.6
(x+40)/(x+80)-0.6 = 0
(x+40)/(x+80)+(-0.6*(x+80))/(x+80) = 0
x-0.6*(x+80)+40 = 0
0.4*x-8 = 0
(0.4*x-8)/(x+80) = 0
(0.4*x-8)/(x+80) = 0 // * x+80
0.4*x-8 = 0
0.4*x-8 = 0 // + 8
0.4*x = 8 // : 0.4
x = 8/0.4
x = 20
x = 20
| 12-7x=17-4x | | 12-7x=0-4x | | 20-4(3)= | | 16/340= | | 4x+17=99x-17 | | 4x+17=8-9x | | 5x+10=8-9x | | 5x+10=8-4x | | 12.10/3 | | y=88-3x | | 3x+12=3x-3 | | n-6/-4=6 | | 7-5/8z=-23 | | 4x+64=9x | | x/-7+10=7 | | 5.8x-1=4.8 | | 4a^2+26a+12=0 | | x-5/6=4/3 | | x-8.4=-3.9 | | 2(2-4x)=25 | | 5+n/4.2=-4 | | -12/7+a=48 | | 7x+11=127+x | | 35(12+d)=2170 | | 46.70/11.70 | | y=4x^4-17x^2+18 | | 2+6/2*16 | | 140/35 | | 3(5w+8)-10w-3w=-6 | | x-15=x+77 | | 6.3x+4=5.3x | | t+12.6=-6.8 |