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If the universe was as per Einstein wouldn't it have a box with a gravitational boundary? Do you tech civil engineering there and how good does your English have to be? The area of a rectangle is x^-2x-8. The width of the rectangle is (x+2). What is the length? How to solve objective equation? Triple order for X-2y+3z=-3, 2x-3y-z=7, 3x+y-2z=6?