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(1/2)*x-((3/4)*x)+((5/83)/2)*x-(5/2) = 0
(1/2)*x+(-3/4)*x+((5/83)/2)*x-5/2 = 0
-73/332*x-5/2 = 0 // + 5/2
-73/332*x = 5/2 // : -73/332
x = 5/2/(-73/332)
x = -830/73
x = -830/73
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