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(1/3)*x = 1/3-(2*x) // - 1/3-(2*x)
(1/3)*x+2*x-(1/3) = 0
(1/3)*x+2*x-1/3 = 0
7/3*x-1/3 = 0 // + 1/3
7/3*x = 1/3 // : 7/3
x = 1/3/7/3
x = 1/7
x = 1/7
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