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x in (-oo:+oo)
54.25*(2/3) = x+18.4 // - x+18.4
54.25*(2/3)-x-18.4 = 0
17.7666668475-x = 0 // - 17.7666668475
-x = -17.7666668475 // * -1
x = 17.7666668475
x = 17.7666668475
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