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x in (-oo:+oo)
x/19 = 5/47.5 // - 5/47.5
x/19-(5/47.5) = 0
x/19-0.10526316 = 0
1/19*x-0.10526316 = 0 // + 0.10526316
1/19*x = 0.10526316 // : 1/19
x = 0.10526316/1/19
x = 2
x = 2
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