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(1/3)*(12*x+16)+2/3 = 0
1/3*(12*x+16)+2/3 = 0
(1/3*3*(12*x+16))/3+2/3 = 0
1/3*3*(12*x+16)+2 = 0
12*x+18 = 0
(12*x+18)/3 = 0
(12*x+18)/3 = 0 // * 3
12*x+18 = 0
12*x+18 = 0 // - 18
12*x = -18 // : 12
x = -18/12
x = -3/2
x = -3/2
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