If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(100-2x)x(80-2x)=8000
We move all terms to the left:
(100-2x)x(80-2x)-(8000)=0
We add all the numbers together, and all the variables
(-2x+100)x(-2x+80)-8000=0
We move all terms containing x to the left, all other terms to the right
(-2x+100)x(-2x+80)=8000
| 190=160+10h | | 10+4w=2-3(w+2) | | 12+x/4=7 | | -3y-2=2y-7 | | 33/7w=331/7 | | 2.5x=7.7+4.7 | | 5y+15=4y+9 | | x+10-3(x-4)=0 | | (x+15)+(2x-20)+(2x)=180 | | 9n-4=11n | | 5a/a-3-7=15/a-3 | | 12+5+19+19+20+8+1+14+15+18+5+17+21+1+12+20+15+7+18+5+1+20+5+18+20+8+1+14+15+18+5+17+21+1+12+20+15+x=494 | | 31/4x=62/7 | | 1/3x+1/5=7/6(-7x-3) | | -27=45+7y | | 2x/3+51=57 | | 13+12=-5(4x-5) | | 5(2x-3)=-3(7-2x) | | 4(2g-3)=8+5g-18 | | 1/3x+1/5=7/6(-7-3) | | -2y=45+y | | 13+12=+5(4x-5) | | m/9-11=4 | | 4(2x-8)=3(2-3x | | x3.9=12.4 | | -3y=45+y | | 3(2d-2-(8-2d)=-30 | | 3(x+1)^2=108 | | 2g+-10+8g=1-g | | 0.15(x+4000)=4300 | | 6x+6=-10x+25+2x | | -7(-1+7p)=154 |