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(4/3)*x-(15/6) = 3*x // - 3*x
(4/3)*x-(3*x)-(15/6) = 0
(4/3)*x-3*x-5/2 = 0
-5/3*x-5/2 = 0 // + 5/2
-5/3*x = 5/2 // : -5/3
x = 5/2/(-5/3)
x = -3/2
x = -3/2
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