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5*x+9 = 144/11 // - 144/11
5*x-(144/11)+9 = 0
5*x-144/11+9 = 0
5*x-45/11 = 0 // + 45/11
5*x = 45/11 // : 5
x = 45/11/5
x = 9/11
x = 9/11
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