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(2/3)*x-((4/5)*x) = 14 // - 14
(2/3)*x-((4/5)*x)-14 = 0
(2/3)*x+(-4/5)*x-14 = 0
-2/15*x-14 = 0 // + 14
-2/15*x = 14 // : -2/15
x = 14/(-2/15)
x = -105
x = -105
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