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18.12-(25.02*x) = (16/2.33)*x+6.8 // - (16/2.33)*x+6.8
18.12-(25.02*x)-((16/2.33)*x)-6.8 = 0
18.12-25.02*x-6.86695279*x-6.8 = 0
11.32-31.88695279*x = 0 // - 11.32
-31.88695279*x = -11.32 // : -31.88695279
x = -11.32/(-31.88695279)
x = 0.35500413
x = 0.35500413
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