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x in (-oo:+oo)
x/7.4 = 5.4 // - 5.4
x/7.4-5.4 = 0
0.13513514*x-5.4 = 0 // + 5.4
0.13513514*x = 5.4 // : 0.13513514
x = 5.4/0.13513514
x = 39.95999856
x = 39.95999856
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