X=

Or it would be approximately: x≈ 0.37228132, -5.37228132
Hope this helped! ;P
Sorry but you are cheating yourself but cheating in exams
I know but I will not say you real understand by yourself cheating is big than dying
Answer:
Area will be 2(lb + bh + hl)
So 2*(12*9 + 9*4 + 4*12)
384 sqft