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x in (-oo:+oo)
2/0.3 = x/0.75 // - x/0.75
2/0.3-(x/0.75) = 0
2/0.3-1.33333333*x = 0
6.66666667-1.33333333*x = 0 // - 6.66666667
-1.33333333*x = -6.66666667 // : -1.33333333
x = -6.66666667/(-1.33333333)
x = 5.00000002
x = 5.00000002
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