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(1/5)*x+1/3 = 14/15-x // - 14/15-x
(1/5)*x+x+1/3-(14/15) = 0
(1/5)*x+x+1/3-14/15 = 0
6/5*x-3/5 = 0 // + 3/5
6/5*x = 3/5 // : 6/5
x = 3/5/6/5
x = 1/2
x = 1/2
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