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(3/5)*x = 5/9 // - 5/9
(3/5)*x-(5/9) = 0
(3/5)*x-5/9 = 0
3/5*x-5/9 = 0 // + 5/9
3/5*x = 5/9 // : 3/5
x = 5/9/3/5
x = 25/27
x = 25/27
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