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(2/3)*x+1/4 = (67/6)*x-(1/3) // - (67/6)*x-(1/3)
(2/3)*x-((67/6)*x)+1/4+1/3 = 0
(2/3)*x+(-67/6)*x+1/4+1/3 = 0
7/12-21/2*x = 0 // - 7/12
-21/2*x = -7/12 // : -21/2
x = -7/12/(-21/2)
x = 1/18
x = 1/18
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