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(2*x)/3-x-(4/2) = x-13 // - x-13
(2*x)/3-x-x-(4/2)+13 = 0
(2*x)/3-x-x-2+13 = 0
11-4/3*x = 0 // - 11
-4/3*x = -11 // : -4/3
x = -11/(-4/3)
x = 33/4
x = 33/4
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