Выполни деление : 1) (27х-9у): 3 2) (117m-39n): 13 3) 136a-85b): 17 4) (128c-72d): 8

1) (27х - 9у) : 3 = 9х - 3у = 3 * (3х - у)
2) (117m - 39n) :13 = 9m - 3n = 3 * (3m - n)
3) (136a - 85b) : 17 = 8a - 5b
4) (128c - 72d) : 8 = 16c - 9d