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(5/9)*x-(9/5) = (1/8)*x // - (1/8)*x
(5/9)*x-((1/8)*x)-(9/5) = 0
(5/9)*x+(-1/8)*x-9/5 = 0
31/72*x-9/5 = 0 // + 9/5
31/72*x = 9/5 // : 31/72
x = 9/5/31/72
x = 648/155
x = 648/155
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