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x in (-oo:+oo)
8.3 = x/2 // - x/2
8.3-(x/2) = 0
8.3-1/2*x = 0 // - 8.3
-1/2*x = -8.3 // : -1/2
x = -8.3/(-1/2)
x = 16.6
x = 16.6
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