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7*x+6 = 11/3 // - 11/3
7*x-(11/3)+6 = 0
7*x-11/3+6 = 0
7*x+7/3 = 0 // - 7/3
7*x = -7/3 // : 7
x = -7/3/7
x = -1/3
x = -1/3
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