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