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1/6 = 3/10-((3/15)*x) // - 3/10-((3/15)*x)
(3/15)*x+1/6-(3/10) = 0
(3/15)*x+1/6-3/10 = 0
1/5*x-2/15 = 0 // + 2/15
1/5*x = 2/15 // : 1/5
x = 2/15/1/5
x = 2/3
x = 2/3
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