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6*x+9 = 39/5 // - 39/5
6*x-(39/5)+9 = 0
6*x-39/5+9 = 0
6*x+6/5 = 0 // - 6/5
6*x = -6/5 // : 6
x = -6/5/6
x = -1/5
x = -1/5
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