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(2/3)*x+5/6 = 4*x // - 4*x
(2/3)*x-(4*x)+5/6 = 0
(2/3)*x-4*x+5/6 = 0
5/6-10/3*x = 0 // - 5/6
-10/3*x = -5/6 // : -10/3
x = -5/6/(-10/3)
x = 1/4
x = 1/4
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