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3*x-(2/5) = 1-(x/8) // - 1-(x/8)
3*x+x/8-(2/5)-1 = 0
3*x+x/8-2/5-1 = 0
25/8*x-7/5 = 0 // + 7/5
25/8*x = 7/5 // : 25/8
x = 7/5/25/8
x = 56/125
x = 56/125
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