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5*x+2 = 28/9 // - 28/9
5*x-(28/9)+2 = 0
5*x-28/9+2 = 0
5*x-10/9 = 0 // + 10/9
5*x = 10/9 // : 5
x = 10/9/5
x = 2/9
x = 2/9
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