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x in (-oo:+oo)
(1/2)*(x+3)-((2/3)*(x-2)) = 80 // - 80
(1/2)*(x+3)-((2/3)*(x-2))-80 = 0
(1/2)*(x+3)+(-2/3)*(x-2)-80 = 0
1/2*(x+3)-2/3*(x-2)-80 = 0
1/2*(x+3)-2/3*(x-2)-80 = 0
17/6-1/6*x-80 = 0
-1/6*x-463/6 = 0
-1/6*x-463/6 = 0
-1/6*x-463/6 = 0 // + 463/6
-1/6*x = 463/6 // : -1/6
x = 463/6/(-1/6)
x = -463
x = -463
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