Question

Помогите пожалуйста номер 723

Answer 1

3 6/7х-7/9х+4 4/63х=27/7х-7/9х+4 4/63х=194/63х+4 4/63х=3 5/63х+4 4/63х=7 9/63=7 1/7х

4 2/9у+3 1/5у-2у=7 19/45у-2у=5 19/45у

5 3/10х-2 7/100х-2/25х=530/100х-207/100х-8/100х=315/100х=63/20х=3 3/20х

5у-4 3/8у+4/5у=5/8у+4/5у=57/40у= 1 17/40