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6*x+2/5 = 341/40-(7*x) // - 341/40-(7*x)
6*x+7*x+2/5-(341/40) = 0
6*x+7*x+2/5-341/40 = 0
13*x-65/8 = 0 // + 65/8
13*x = 65/8 // : 13
x = 65/8/13
x = 5/8
x = 5/8
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