Помогите решить номер1022 пож.плиз.срочно

7-5.1/4=6.4/4-5.1/4=1.3/4 6-5.2/3=5.3/3-5.2/3=1/3 12-9.3/8=11.8/8-9.3/8=2.5/8 11-6.2/3=10.3/3-6.2/3=4.1/3 8-3.2/7=7.7/7-3.2/7=4.5/7