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2*x-4 = 5/9 // - 5/9
2*x-(5/9)-4 = 0
2*x-5/9-4 = 0
2*x-41/9 = 0 // + 41/9
2*x = 41/9 // : 2
x = 41/9/2
x = 41/18
x = 41/18
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