A plane was originally flying at an altitude of x feet when it ascended 2,000 feet and then descended 5,000 feet. If the plane's altitude after these two changes was 1/5 its original altitude, then the solution of which of the following equations gives the plane's original altitude, in feet ?	Choose the correct choice.
A) x + 2000 = 1/3*(x - 3000)  B) 1/3*(x - 3000) = x  C) x + 3000 = 1/3*x  D) x - 7000 = 1/3*x  E) x - 3000 = 1/5*x
Plane's original altitude = x   Plane's new altitude after ascending 2000 ft = x+2000   Plane's new altitude after descending 5000 ft from previous altitude = x+2000-5000 = x-3000   So, after two changes plane is at 1/5 its original altitude =&gt; x-3000 = x/5   Answer (x - 3000 = 1/5*x)
<result>E</result>
A plane was originally flying at an altitude of x feet when it ascended 2,000 feet and then descended 5,000 feet. If the plane's altitude after these two changes was 1/5 its original altitude, then the solution of which of the following equations gives the plane's original altitude, in feet ?