Answer:
8 17/42.
Step-by-step explanation:
WE convert each fraction 's denominator to the LCD ( lowest common denominator. LCD of 7 14 and 21 = 42.
So we have 8 32/42 + 8 33/42 - 9 6/42
8 + 8 - 9 = 7.
32/42 + 33/42 - 6/42
= 59/42 = 1 17/42.
7 + 1 17/42
= 8 17/42.
