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(1/3)*x-(1/2) = 12-((5/3)*x) // - 12-((5/3)*x)
(1/3)*x+(5/3)*x-(1/2)-12 = 0
(1/3)*x+(5/3)*x-1/2-12 = 0
2*x-25/2 = 0 // + 25/2
2*x = 25/2 // : 2
x = 25/2/2
x = 25/4
x = 25/4
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