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(2/3)*x+3 = 5*x // - 5*x
(2/3)*x-(5*x)+3 = 0
(2/3)*x-5*x+3 = 0
3-13/3*x = 0 // - 3
-13/3*x = -3 // : -13/3
x = -3/(-13/3)
x = 9/13
x = 9/13
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