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11/2 = x/6.6 // - x/6.6
11/2-(x/6.6) = 0
11/2-0.15151515*x = 0
11/2-0.15151515*x = 0 // - 11/2
-0.15151515*x = -11/2 // : -0.15151515
x = -11/2/(-0.15151515)
x = 36.30000036
x = 36.30000036
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