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56/4.8 = x/18 // - x/18
56/4.8-(x/18) = 0
11.66666667-1/18*x = 0 // - 11.66666667
-1/18*x = -11.66666667 // : -1/18
x = -11.66666667/(-1/18)
x = 209.99998326
x = 209.99998326
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