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0.1/48 = x/690 // - x/690
0.1/48-(x/690) = 0
0.00208333-1/690*x = 0 // - 0.00208333
-1/690*x = -0.00208333 // : -1/690
x = -0.00208333/(-1/690)
x = 1.4374931
x = 1.4374931
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