Question

поможете 3 и 4 ??????​

Answer 1

а) (х + (1 7/15)) - (2/15) = (1 11/15)
х + (1 7/15) - (2/15) = (1 11/15)
х = (1 11/15) - (1 7/15) + (2/15)
х = (4/15) + (2/15)
х = (6/15) - шесть пятнадцатых

б) (у - (2/15)) * (1 5/6) = (2 1/5)
у - (2/15) * (1 5/6) = (2 1/5)
у - (2/15) * (11/6) = (2 1/5)
у - (11/45) = (2 1/5)
у = (2 1/5) + (11/45)
у = (2 9/45) + (11/45)
у = (2 20/45)
у = (2 4/9) - две целых и четыре девятых

в) (х - (8 12/19)) + (1 7/19) = (6 2/19)
х - (8 12/19) + (1 7/19) = (6 2/19)
х = (6 2/19) + (8 12/19) - (1 7/19)
х = (14 14/19) - (1 7/19)
х = (13 7/19) - тринадцать целых и семь девятнадцатых




((3/5)/(6/17)) * (1 2/3) + (77 1/6) = ((3/5) * (17/6)) * (1 2/3) + (77 1/6) = (17/10) * (1 2/3) + (77 1/6) = (17/10) * (5/3) + (77 1/6) = (17/6) + (77 1/6) = (77 18/6) = 80