X + 6 by 4 - 5 x - 4 by 8+ x- 3 by 5 = 0
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x+6/4 - 5x-4/8 + x-3/5=0
(10x+60-25x+20+8x-24)/40 = 0
56-7x = 0
7x=56
x = 56/7 = 8
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