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6*x+7 = 2*x+19/5 // - 2*x+19/5
6*x-(2*x)-(19/5)+7 = 0
6*x-2*x-19/5+7 = 0
4*x+16/5 = 0 // - 16/5
4*x = -16/5 // : 4
x = -16/5/4
x = -4/5
x = -4/5
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