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(2/5)*x-8 = (-1/3)*x-8 // - (-1/3)*x-8
(2/5)*x-((-1/3)*x)-8+8 = 0
(2/5)*x+(1/3)*x-8+8 = 0
11/15*x = 0 // : 11/15
x = 0
x = 0
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