Ответ: 2
(5+4x)/10 : (5+4x)/20
20(5+4x)/10(5+4x) = 100+80x/50+40x
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Ответ: 2
(5+4x)/10 : (5+4x)/20
20(5+4x)/10(5+4x) = 100+80x/50+40x