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1/12 = x/3-((3*x)/4) // - x/3-((3*x)/4)
(3*x)/4-(x/3)+1/12 = 0
5/12*x+1/12 = 0 // - 1/12
5/12*x = -1/12 // : 5/12
x = -1/12/5/12
x = -1/5
x = -1/5
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