8\15=6х\9 2/12=15/9х 12/13=18х/39
8/15 = 6x/9 8*9 = 15*6x 72 = 90x 90x = 72 9x = 8 x = 8/9 2/12 = 15/9x 18x = 180 x = 10 12/13 = 18x/39 468 = 234x 234x = 468 x = 2
спасибо огромное
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