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(1/3)*(9*x+3)+16 = 0
1/3*(9*x+3)+16 = 0
1/3*(9*x+3)+16 = 0
3*x+17 = 0
3*x+17 = 0
3*x+17 = 0 // - 17
3*x = -17 // : 3
x = -17/3
x = -17/3
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