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X in (-oo:+oo)
6.24 = (9.31-X)/0.3 // - (9.31-X)/0.3
6.24-((9.31-X)/0.3) = 0
6.24-3.33333333*(9.31-X) = 0
6.24-3.33333333*(9.31-X) = 0
3.33333333*X-24.7933333023 = 0
3.33333333*X-24.7933333023 = 0
3.33333333*X-24.7933333023 = 0 // + 24.7933333023
3.33333333*X = 24.7933333023 // : 3.33333333
X = 24.7933333023/3.33333333
X = 7.438
X = 7.438
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