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(2/3)*x+6 = x+8/3 // - x+8/3
(2/3)*x-x-(8/3)+6 = 0
(2/3)*x-x-8/3+6 = 0
10/3-1/3*x = 0 // - 10/3
-1/3*x = -10/3 // : -1/3
x = -10/3/(-1/3)
x = 10
x = 10
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