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6*x+4 = 80/11 // - 80/11
6*x-(80/11)+4 = 0
6*x-80/11+4 = 0
6*x-36/11 = 0 // + 36/11
6*x = 36/11 // : 6
x = 36/11/6
x = 6/11
x = 6/11
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