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X in (-oo:+oo)
(2*X)/16 = 4*(9/2) // - 4*(9/2)
(2*X)/16-(4*(9/2)) = 0
(2*X)/16-18 = 0
1/8*X-18 = 0 // + 18
1/8*X = 18 // : 1/8
X = 18/1/8
X = 144
X = 144
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