Question 297366
(250*160)*1.6=(250+X)(160+X)
64,000=40,000+410X+X^2
X^2+410X+40,000-64,000=0
X^2+410X-24,000=0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}} 
x=(-410+-sqrt[410^2-4*1*-24,000])/2*1
x=(-410+-sqrt[168,100+96,000])/2
x=(-410+-sqrt264,100)/2
x=(-410+-513.9066)/2
x=(-410+513.9066)/2
x=103.9066/2
x=51.9533 ans. for the measurement extensions.
Proof:
64,000=(250+51.9533)(160+51.9533)
64,000=301.9533*211.9533
64,000=64,000