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0 = (9/2)^(7/2)-(4*x) // - (9/2)^(7/2)-(4*x)
4*x-(9/2)^(7/2)+0 = 0
4*x-(9/2)^(7/2) = 0
4*x-(9/2)^(7/2) = 0 // + (9/2)^(7/2)
4*x = (9/2)^(7/2) // : 4
x = ((9/2)^(7/2))/4
x = ((9/2)^(7/2))/4
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