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(4/9)*(2*x-4) = 48 // - 48
(4/9)*(2*x-4)-48 = 0
4/9*(2*x-4)-48 = 0
4/9*(2*x-4)-48 = 0
8/9*x-448/9 = 0
8/9*x-448/9 = 0
8/9*x-448/9 = 0 // + 448/9
8/9*x = 448/9 // : 8/9
x = 448/9/8/9
x = 56
x = 56
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