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x in (-oo:+oo)
x/19 = 30/12 // - 30/12
x/19-(30/12) = 0
x/19-5/2 = 0
1/19*x-5/2 = 0 // + 5/2
1/19*x = 5/2 // : 1/19
x = 5/2/1/19
x = 95/2
x = 95/2
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