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