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261/1.9 = x/6 // - x/6
261/1.9-(x/6) = 0
137.36842105-1/6*x = 0 // - 137.36842105
-1/6*x = -137.36842105 // : -1/6
x = -137.36842105/(-1/6)
x = 824.21050982
x = 824.21050982
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