If it's not what You are looking for type in the equation solver your own equation and let us solve it.
800-800*0.2=x
We move all terms to the left:
800-800*0.2-(x)=0
We add all the numbers together, and all the variables
-1x+640=0
We move all terms containing x to the left, all other terms to the right
-x=-640
x=-640/-1
x=+640
| 4x^2+2x-2=6 | | 800(800-0.2)=x | | 800*800-0.2=x | | x(x-0.2)=640 | | 2+3x=28 | | 2(8+x)=3 | | x*x-0.2=640 | | 1/2*x/4+2x/3=x+1 | | 1/2xx/4+2x/3=x+1 | | (y-5)-(y+4)=4y | | 2x^2-18x+51=0 | | z/9-4=9 | | 12+34=2x+11 | | (y-5)-(y-4)=4y | | 12-(4p+5)5=3p(10) | | 6y-3=36 | | x-(7.5x/100)=5000 | | P(X)=-0.04x+240x-1000 | | 9n-6=49 | | x+-0.075x=5000 | | 6x−20=40 | | 7a+6=12 | | 2-3p=12 | | 66x2+x=10 | | 28-10y=3y-3 | | 13b-1=3b+9 | | 181=6x-5 | | x^+2x-1=0 | | 4x(3x-2)=2x-5 | | 0.25(x+4)=4(8-3x) | | 2x/3=x/3=8(x/4=x/8)-5 | | 2x/3=x/3=8(x/4=x/80-5 |