3 3/7•а - 3 3/7•b при а=9 5/12 при b=2 11/18

Question

3 3/7•а - 3 3/7•b при а=9 5/12 при b=2 11/18

Answer 1

3 3/7*(a-b)
3 3/7*(9 5/12-2 11/18)=23 1/3

1) 113/12-47/18=339/36-94/36=245/36
2) 3 3/7*245/36=24/7*245/36=70/3=23 1/3