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8 = 9-(((2*4)/5)*x) // - 9-(((2*4)/5)*x)
((2*4)/5)*x-9+8 = 0
8/5*x-1 = 0 // + 1
8/5*x = 1 // : 8/5
x = 1/8/5
x = 5/8
x = 5/8
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