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(4*x)/15 = 6/5 // - 6/5
(4*x)/15-(6/5) = 0
(4*x)/15-6/5 = 0
4/15*x-6/5 = 0 // + 6/5
4/15*x = 6/5 // : 4/15
x = 6/5/4/15
x = 9/2
x = 9/2
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