как сделать математику 5 класс страница 203 упр.605

1) 2/7х = 1х = 1 : 2/7х = 1/1 × 7/2 х = 7/22) 9х = 1х = 1:9х = 1/93) 1 5/8х = 1х = 1 : 1 5/8 = 1/1 : 13/8 = 1/1×8/13х = 8/134) 1/2х = 1х = 1 : 1/2 = 1/1×2/1х = 25) 7/15х = 1х = 1 : 7/15 = 1/1 : 7/15 = 1/1 × 15/7х = 1 6/76) 3 2/5х = 1х = 1 : 3 2/5 = 1/1 : 17/5 = 1/1×5/17х = 5/177) 100х = 1 х = 1:100х = 1/100 = 0.018) 2/13х = 1х = 1 : 2/13 = 1/1 × 13/2х = 13/2 = 6 1/2 = 6.5