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(6*x)/5-x = x/15-(8/3) // - x/15-(8/3)
(6*x)/5-x-(x/15)+8/3 = 0
2/15*x+8/3 = 0 // - 8/3
2/15*x = -8/3 // : 2/15
x = -8/3/2/15
x = -20
x = -20
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