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x in (-oo:+oo)
6*(x-5) = 78/13 // - 78/13
6*(x-5)-(78/13) = 0
6*(x-5)-6 = 0
6*(x-5)-6 = 0
6*x-36 = 0
6*x-36 = 0
6*x-36 = 0 // + 36
6*x = 36 // : 6
x = 36/6
x = 6
x = 6
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