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7*x-1 = -17/3 // + -17/3
7*x-(-17/3)-1 = 0
7*x+17/3-1 = 0
7*x+14/3 = 0 // - 14/3
7*x = -14/3 // : 7
x = -14/3/7
x = -2/3
x = -2/3
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