0,7b=1, 8/19x=8/19, 12/5y=12/5. Помогите пожалуйста

0,7б=17б=10б=10/7б=1 3/78/19х=8/198*19=8*19х19=19хх=19/19х=112/5у=12/512*5=5у*125=5уу=5/5у=1

0,7b = 1b = 1 : 0,7b = 1 : 7/10b = 10/7b = 1целая 3/7--------------------------------------8/19х = 8/19х = 8/19 : 8/19х = 1-----------------------------12/5у = 12/5у = 12/5 : 12/5у = 1