Step-by-step explanation:

9 x (9 ÷ 3) + 6 = 3

(9 x 3 ) + 6 = 27

27 + 6 = 31

ans: 31

(10 ÷ 4) x 5 - 7 + 8 = 4.5

(2.5 x 5) - 7 + 8 = 12.5

(12.5 - 7) + 8 = 5.5

5.5 + 8 = 13.5

ans: 13.5