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(1/3)*(4*x+1) = 3*(1-(2*x))+12 // - 3*(1-(2*x))+12
(1/3)*(4*x+1)-(3*(1-(2*x)))-12 = 0
(1/3)*(4*x+1)-3*(1-2*x)-12 = 0
1/3*(4*x+1)-3*(1-2*x)-12 = 0
1/3*(4*x+1)-3*(1-2*x)-12 = 0
22/3*x-12-8/3 = 0
22/3*x-44/3 = 0
22/3*x-44/3 = 0
22/3*x-44/3 = 0 // + 44/3
22/3*x = 44/3 // : 22/3
x = 44/3/22/3
x = 2
x = 2
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