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(7*x)/8-4 = 1-((15*x)/16) // - 1-((15*x)/16)
(7*x)/8+(15*x)/16-4-1 = 0
29/16*x-5 = 0 // + 5
29/16*x = 5 // : 29/16
x = 5/29/16
x = 80/29
x = 80/29
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